Math10_Q2_Mod3_SolvingProblemsOnPolynomialEquations_v2.pdf

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Mathematics
Quarter 2 - Module 3
Solving Problems Involving
Polynomial Functions
Department of Education ● Republic of the Philippines
10

Mathematics- Grade 10
Alternative Delivery Mode
Quarter 2 – Module 3: Solving Problems Involving Polynomial Functions
First Edition, 2020
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Mathematics
Quarter 2 - Module 20
SOLVING PROBLEMS INVOLVING
POLYNOMIAL FUNCTIONS
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Table of Contents
PAGE
What This Module is About
How to Learn from this Module
Icons of this Module
What I Need to Know
What I Know
Lesson 1: Solving Problems Involving Polynomial Functions
Through Evaluation
What I Need to Know..................................................................................................... 1
What I Know..................................................................................................................... 1
What’s In............................................................................................................................ 3
What’s New ................................................................................................................... 3
What Is It ........................................................................................................................... 5
What’s More .................................................................................................................... 6
What I Have Learned..................................................................................................... 8
What I Can Do................................................................................................................. 9
Assessment...................................................................................................................... 9
Additional Activities........................................................................................................ 11
Lesson 2: Solving Problems Involving Polynomial Functions
Through Factoring
What I Know..................................................................................................................... 13
What’s In............................................................................................................................ 15
What’s New ................................................................................................................... 15
What Is It ........................................................................................................................... 17
What’s More .................................................................................................................... 19
What I Can Do................................................................................................................. 21
Assessment...................................................................................................................... 22
Lesson 3: Modeling Polynomials (Day 3 and 4)
What I Know..................................................................................................................... 26
What’s In............................................................................................................................ 28
What’s New ................................................................................................................... 28
What Is It ........................................................................................................................... 29
What’s More .................................................................................................................... 33
What I Can Do................................................................................................................. 35
Assessment...................................................................................................................... 36

Summary .................................................................................................................................................. 39
Assessment: (Post-Test) ...................................................................................................................... 40
Answer Key................................................................................................................................................ 42
References 46
.......................................................................................................................................................................

What This Module is About
Welcome to Mathematics 10. This is the Alternative Delivery Mode Module
(ADM) in solving problems involving polynomial functions. On this module, you will
encounter different kinds of real-life problems that’s involves polynomial functions
and ways on how to solve them. This module will also test your previous knowledge
about polynomials.
This module was collaboratively designed, developed and reviewed by
educators both from public and private institutions to assist you, the teacher or
facilitator in helping the learners meet the standards set by the K to 12 Curriculum
while overcoming their personal, social, and economic constraints in schooling.
This learning resource hopes to engage the learners into guided and
independent learning activities at their own pace and time. Furthermore, this also
aims to help learners acquire the needed 21st century skills while taking into
consideration their needs and circumstances.
For the Facilitators:
As a facilitator you are expected to orient the learners on how to use this
module. You also need to keep track of the learners' progress while allowing them to
manage their own learning. Furthermore, you are expected to encourage and assist
the learners as they do the tasks included in the module.
For the Learners and Parents:
This module was designed to provide you with fun and meaningful
opportunities for guided and independent learning at your own pace and time. You
will be enabled to process the contents of the learning resource while being an active
learner.
If you encounter any difficulty in answering the tasks in this module, do not
hesitate to consult your teacher or facilitator. Always bear in mind that you are not
alone.
We hope that through this material, you will experience meaningful learning
and gain deep understanding of the relevant competencies. You can do it!

How to Learn from this Module
To achieve the desired objectives, you are to do the following:
• Take your time reading the lessons carefully.
• Follow the directions and/or instructions in the activities and exercises diligently.
• Answer all the given tests and exercises.
Icons of this Module
What I Need to
Know
This part contains learning objectives that
are set for you to learn as you go along the
Module each day/lesson.
What I know
This is a pre-test assessment as to your level
of knowledge to the subject matter at hand,
meant specifically to gauge prior related
knowledge.
What’s In
This part connects previous lesson with that
of the current one.
What’s New
An introduction of the new lesson through
various activities, before it will be presented
to you.
What is It
These are discussions of the activities as a
way to deepen your discovery and under-
standing of the concept.
What’s More
These are follow-up activities that are in-
tended for you to practice further in order to
master the competencies.
What I Have
Learned
Activities designed to process what you
have learned from the lesson.
What I can do
These are tasks that are designed to show-
case your skills and knowledge gained, and
applied into real-life concerns and situations.
Assessment
This is a task which aims to evaluate your
level of mastery in achieving the learning
competency.
Additional
Activities
In this portion, another activity will be given
to you to enrich your knowledge or skill of the
lesson learned. This also tends retention of
learned concepts.
Answer Key
This contains answers to all activities in the
module.

What I Need to Know
This module was designed and created especially for you. This will help you
understand polynomial functions deeper and solve real-life problems involving
polynomial functions. The scope of this module permits it to be used in many
different learning situations. The language used recognizes the diverse vocabulary
level of students. The lessons are arranged to follow the standard sequence of the
course. But the order in which you read them can be changed to correspond with the
textbook you are now using.
After going through this module, you are expected to:
1. identify the necessary information to be used in solving real-life problems
involving polynomial functions;
2. solve real-life problems that can be modeled with polynomial functions
through evaluation; and
3. apply polynomial functions to real-life problems and produce a concrete object
that satisfies the condition given on the problem.

What I Know
Let us find out how much you already know about the topics in this module.
Answer all items. Choose the letter of the correct answer to each question. Write the
chosen letter on a separate sheet of paper.
1. A furniture dealer determines that its profit, P, in thousands of pesos, can be
modeled by the function P(x) = 0.0012x3 + 2x – 25, where x represents the number
of furniture sold. What is the profit when x = 50?
A. Php 200, 000 B. Php 225, 000
C. Php 250, 000 D. Php 275, 000
2. In this school year, 50 high school students participated in one-week Human vs
Zombie game. The number of zombies, Z, after d days of playing can be modeled
by the function Z(d) = 5d3 – 3d2 + 15. How many days did it take for the number of
zombies to reach 565?
A. 4 B. 5 C.6 D. 7
3. Faye is going to throw a rock from the top of a trail overlooking the ocean. When
she throws the rock upward from 160 ft above the ocean, the function
h(t) = -16t2 + 48t + 160 models the height, h, of the rock above the ocean as a
function of time, t. Find the height of the rock at t = 1.5 seconds.
A. 148 ft B. 164 ft C. 180 ft D. 196 ft
4. The estimated number of electric vehicles, V (in thousands), in the Philippines can
be modeled by the polynomial function:
V(y) = 0.15128y3 – 3.28234y2 + 23.7565y – 2.041 where y represents the number
of years after the year 2005. Find the estimated number of electric vehicles at the
end of the year 2007. Round up to the nearest thousands.
A. 32, 000 B. 33, 000
C. 34, 000 D. 35, 000
5. The weight, w (in kilograms), of a certain fish can be modeled by w = 0.00304x3,
where x is the length of the fish in inches. What is the weight of a 12-inch fish?
A. 5.00 kg B. 5.25 kg C. 5.50 kg D. 5.75 kg
6. The profit, P (in millions of pesos), for a flash drive manufacturer can be modeled
by P = n3 + 6n2 - 7n where n (in millions) is the number of flash drive produced.
How many flash drives was produced if the profit reached 60 million pesos?
A. 3, 000, 000 B. 4, 000, 000
C. 5, 000, 000 D. 6, 000, 000
7. The volume, V (in cubic feet), of a rectangular hydraulic block is modeled by the
polynomial function V(w) = 6w3 – 19w2 – 52w where w is the width (in feet) of the
hydraulic block. What is the width of the hydraulic block if its volume is 15 cubic
feet?
A. 4 feet B. 5 feet C. 6 feet D. 7 feet
8. During a 20-year period, the amount (in millions of pesos) of school supplies (S)
sold can be modeled by S(t) = - 20t3 + 25t2 – 280t + 3320, where t is in years. Find
the amount of school supplies sold in 5 years.
A. Php 35, 000, 000 B. Php 40, 000, 000
C. Php 45, 000, 000 D. Php 50, 000, 000

For Item number 9 – 11, refer to the problem below.
On a glass factory, paperweights are created by pouring molten glass into molds.
Each mold is a rectangular prism with a height 3 cm greater than the length of each side
of its square base. Each mold holds 112 cubic centimeters of glass.
9. If x represents the length of each side of the square base, which of the following
mathematical model satisfy the condition of the above problem?
A. (x + 3) (x + 3) (x) = 112 B. (x + 3) (x) (x) = 112
C. (x + 3) (x) = 112 D. 112 (x + 3) = (x) (x)
10. What is the height of the glass mold?
A. 4 cm B. 5cm C. 6 cm D. 7 cm
11. What are the dimensions of the glass molds? (Follow V = LWH)
A. 4 cm by 5 cm by 8 cm B. 4 cm by 4 cm by 7 cm
C. 5 cm by 5 cm by 8 cm D. 5 cm by 8 cm by 8 cm
A construction company was hired to build a swimming pool for public use. The
client wants the depth of the pool to be 2 meters less than the width and the length is 10
meters more than the width. The client also specified that the pool must have a water
capacity of 595 cubic meters.
12. If w represents the measurement of the width, which of the following mathematical
model satisfy the condition of the above problem?
A. (w - 2) (w + 2) (w) + 10 = 595 B. (w - 2) (w - 10) (w) = 595
C. (w - 2) (w + 10) (w) = 595 D. (w - 10) (w + 2) (w) = (595
13. How deep is the pool?
A. 3 meters B. 4 meters C. 5 meters D. 6 meters
14. How long is the pool?
15. What are the dimensions of the swimming pool? (Follow V = LWH)
A. 17 m by 5 m by 5 m B. 12 m by 2 m by 7 m
C. 12 m by 5 m by 8 m D. 17 m by 7 m by 5 m

1
Lesson
1
Polynomial Functions
Through Evaluation (Day 1)
What I Need to Know
After going through this lesson, you are expected to:
involving polynomial functions; and
through evaluation.
What I Know
Let us find out how much you already know about the topic on this lesson.
For Items number 1 – 5, Refer to the problem below.
The estimated number of electric vehicles, V (in thousands), in the Philippines can
be modeled by the polynomial function: V(y) = 0.15128y3 – 3.28234y2 + 23.7565y –
2.041 where y represents the number of years after the year 2005.
1. What is the value of y at the end of year 2008?
A. 3 B. 4 C. 5 D. 6
2. Based on the problem, V represents __________.
A. the estimated number of electric vehicles.
B. the number of years after the year 2005.
C. the estimated number of the modeled polynomial function.
D. the number of vehicles present in the Philippines.
3. At what year after 2005 will the estimated number of electric vehicles be
calculated if y = 5?
A. 2005 B. 2007 C. 2008 D. 2010
4. What is V(y) if the value of y = 2? (Round off to the nearest thousand).
A. 33, 000 B. 34, 000 C. 35, 000 D. 36, 000

2
5. What is the estimated number of electric vehicles at the end of year 2008?
(Round off to the nearest thousand).
A. 45, 000 B. 46, 000 C. 47, 000 D. 48, 000
The volume, V (in cubic feet), of a rectangular hydraulic block is modeled by the
polynomial function V(w) = 2w3 + 11w2 – 12w where w is the width (in feet) of the
hydraulic block.
6. Based on the problem, w represents __________.
A. the volume of the rectangular hydraulic block.
B. the length of the rectangular hydraulic block.
C. the width of the rectangular hydraulic block.
D. the height of the rectangular hydraulic block.
7. The polynomial function represents ____________.
A. the volume of the rectangular hydraulic block.
B. the length of the rectangular hydraulic block.
C. the width of the rectangular hydraulic block.
D. the height of the rectangular hydraulic block.
8. What is V(w) if the value of w = 4?
A. 48 ft3 B. 128 ft3 C. 176 ft3 D. 256 ft3
9. What is the volume of a 2 feet wide hydraulic block?
A. 36 ft3 B. 40 ft3 C. 44 ft3 D. 48 ft3
10. The polynomial function of the rectangular block represents what equation?
A. B. C. D.
The profit, P (in millions of pesos), for a flash drive manufacturer can be modeled
by P = 6n3 + 72n where n (in millions) is the number of flash drive produced. What would
be the profit of the manufacturer if it produced 3 million flash drives?
11. Based on the problem, P represents __________.
A. the number of flash drive produced.
B. the profit of the flash drive manufacturer.
C. the 3 million flash drives produced.
D. the number of manufacturers who produce flash drives.
12. Based on the problem, if the value of n = 5 then the manufacturer produced how
many flash drives?
A. 5 000 B. 50 000 C. 500 000 D. 5 000 000
13. What is the value of n when the manufacturer produced 3 000 000 flash drives?
A. 3 B. 300 C. 30 000 D. 3 000 000
14. What is P if the value of n = 3?
A. 162 million B. 216 million C. 342 million D. 378 million
15. What would be the profit of the manufacturer if it produced 2 million flash drives?
A. 54 million B. 144 million C. 192 million D. 216 million

3
What’s In
Determine the leading term, end behaviors, y –intercept, and number of
turning points for each given polynomial function.
1. f(x) = (x2 – 3)2 (x2 – 1)2
2. f(x) = (x2 – 7) (x – 1)2 (x – 2)3
3. f(x) = -x3 – x2 + 2x
What’s New
Let’s Explore
1. Suppose that the Town of Talakag discovered wild boars near the town’s
outskirts in 2010. So, they began tracking the number of wild boars near the
town outskirts each year and the following chart shows how many wild
boars, B, were present each year, x, after 2010.
x (years) 1 2 3 4 5 5.5 6
B (number
of wild
boars)
1 4 10 20 35 45 56
Some Zoologist were called in to analyze the population trends of the
wild boars in hopes to keep the population under control, and they found the
data in the chart can be modeled using the function:
where B is the number of wild boars on x years.
Were you able to apply all the necessary concepts and properties in
graphing each function? The next activity will let you see the connections of these
mathematics concepts to real – life situations.

4
Questions/ Tasks:
a. Using the graph, what is the approximate number of wild boars after 3.5
years?
b. Compare the number of wild boars in year 5.5 as given on the table to the
number of wild boars given using the polynomial functions. Why are these
values not exactly the same?
c. Do you think you can use the polynomial function to predict the number of
wild boars on the 10th year? Why or why not?
Let’s try this
Answer the following:
1. The number of cable TV systems sold after year 2010 can be modeled by the
polynomial function C(t) = -43.2t2 + 1343t + 790, where t represents the
number of years since 2010.
a. How many cable TV systems sold after the end of 2015?
b. After 10 years from 2010, what is the expected number of cable TV
systems sold?
2. Suppose that the average fuel (in Liters) consumed by individual vehicles
monthly in Philippines is modeled by the cubic equation F(t) = 0.025t3 – 1.5t2
+ 18.25t + 148, where t in the number of months.
a. What is the average fuel consumed by individual vehicles after half a
year?
b. After 1 year, what is the expected average fuel consumed by individual
vehicles?
Were you surprised that polynomial functions can be applied in real – life
problems and also have practical uses? What do you need to solve these
problems? Enjoy learning as you proceed to the next section.

5
3. An owner of a certain resort decided to remove the pollutants on their
swimming pool. The cost C (in pesos) of removing p percent of pollutants from
the swimming pool is given by the polynomial function C(p) = 25x2 – 50x +
24500.
a. What is the cost of removing 20% of the pollutants from the swimming
pool?
b. If the owner decided to remove all the pollutants from the swimming
pool, how much would it cost?
What Is It
Your previous lesson has defined Polynomial Function as a function of the
form P(x) = an xn
+ an-1 xn-1
+ … + a1 x + a0 where an are real numbers called
coefficients and n is a positive integer, and an xn is the leading term, an is the leading
coefficient, a0 is the constant term and an ≠ 0. Since the problems involves
polynomial functions then we could use many ways on solving these kinds of
problems. Here we are going to discuss and solve problems together step by step.
The problems presented below are things that we could relate to real-life situations.
Example 1:
Suppose a windmill generates power based on the speed of the wind. This is
represented by the polynomial function , where s represents the
speed of the wind in kilometers per hour. If the wind speed is 15 kilometers per hour,
how many units of power, P(s), can the windmill generate?
Procedure:
Step 1 , s = 15kph Rewrite the given.
Step 2 Find P (15)
Identify what is asked on the problem.
We have P (15) since it is asking on
how many units of power can the wind
mill generate if the windspeed is 15
kph.
Step 3 ,
Replace all the variable s with 15, since
s = 15 based on the given.
Step 4
Simplify the equation. Remember that
(15)4 = (15((15)(15)(15) = 50625.
Step 5 P(15) = 50.625
By dividing 50625 by 1000, we arrive on
the result 50.625.
Answer: The windmill can generate 50.625 units of power if the wind speed is
15 kilometers per hour.

6
Example 2:
The number of citizen (N) of Barangay San Isidro in t years is predicted to
increase and can modeled by the function N(t) = 7t4 – 4t3 + 150t + 17500. After 3
years, how many citizens will be residing now at Barangay San Isidro?
Procedure:
Step 1
N(t) = 7t4 – 4t3 + 150t + 17500,
t = 3 years
Rewrite the given.
Step 2 Find N(3)
Identify what is asked on the
problem. We have N(3) since it
is asking on how many citizens
will be residing at Barangay
San Isidro after 3 years.
Step 3 N(3) = 7(3)4 – 4(3)3 + 150(3) + 17500
Replace all the variable t with 3,
since t = 3 based on the given.
Step 4 N(3) = 7(81) – 4(27) + 150(3) + 17500
Simplify the equation.
Remember that (3)4 =
(3)(3)(3)(3) = 81 and (3)3 =
(3)(3)(3) = 27. This is to make
multiplication easier.
Step 5 N(3) = 567 – 108 + 450 + 17500
Simplify each term. This is by
multiplying 7 by 81 which is
equal to 567, 4(27) = 108, and
150(3) = 450.
Step 6 N(3) = 18, 409
Add all values to get the final
result. Thus, 567 – 108 + 450 +
17 500 is equal to 18 409.
Answer: There will be 18, 409 citizens residing at Barangay San Isidro after 3
years.
What’s More
Activity 1: Ref! Substitute!
Direction: Answer the following question through evaluating each given polynomial
function. (3 points each)
1. The polynomial function, w = 0.0071d3 – 0.09d2 + 0.48d, models the weight of
the ideal round-cut diamond where w is the diamond’s weight (in carats) and d
is the diameter (in millimeters). Based on the model, find the weight of the
diamond with a diameter of 20 millimeters.
2. A drugstore that sells a certain brand of Vitamin C tablets predicts that their
profit P can be modeled by the polynomial function P(a) = -50a3 + 2400a2 –

7
2000, where a is the amount spent on advertising (in thousands of pesos).
What is its profit if a = 16?
3. Suppose that the total number attendance A (in thousands) at NCAA women’s
basketball games is modeled by the polynomial function
A = -1.95t3 + 70.1t2 – 188t + 2150, from 2000 to 2018, where t is the number of
years since 2000. Find the attendance for the year 2009.
4. The number of eggs, E(x), in a female butterfly is a function of her abdominal
width, x, in millimeters, modeled by E(x) = 14x3 – 17x2 – 16x + 34. How many
eggs can the butterfly carry if the width of her abdomen is 4 millimeters?
5. A pyramid can be formed using same sized balls. For example, 3 balls can be
arranged in a triangle, then the fourth ball placed in the middle on top of them.
The total number of balls used can be modeled by the polynomial function,
, where n is the number of balls on each side of the
bottom layer. What is the total number of balls used to form a pyramid if there
are 5 balls on each side of the bottom layer?
Activity 2: Replace Me!
1. The profit P (in millions) of a certain brand of energy drink in a year is
represented by the polynomial equation P(t) = 5t3 + 20t2 – 30t – 240 where t is
the number of years. How much is the profit after 6 years?
2. If you look at the cross sections of a honeycomb, you will see patterns of
hexagons. Suppose that the number of hexagon H inside a honeycomb is
given by the polynomial function H(y) = 3y2 – y + 1 where y is the number of
layers inside the honeycomb. If there are 5 layers inside the honeycomb, how
many hexagons are present inside?
3. In 2010, the population P of a certain municipality is modeled by the function
P(t) = 6t3 – 700t2 + 5000t + 140000 where t is the number of years after 2010.
What is the population of the municipality after 2019?
4. A windmill generates power based on the speed of the wind. This is
represented by the function , where s represents the speed of
the wind in kilometers per hour. How many units of power, P(s), can the
windmill generate if the wind speed is 10 kilometers per hour?
5. The number of cable TV systems sold after year 2010 can be modeled by the
polynomial function C(t) = -43.2t2 + 1343t + 790, where t represents the
number of years since 2010. How many Cable TV systems is sold at the end
of 2016?

8
What I Have Learned
Direction. Chose a word or phrase from the box below to fill in the missing parts.
1. In solving problems involving polynomial function, I must first ______ the
problem before listing down the given.
2. One of the effective ways to not forget the given is to _____ it down first.
3. Before solving the problem, I must identify first __________.
4. To evaluate a polynomial function, I would just simply ______ the given value
to its corresponding variables then solve.
5. After knowing what is asked, I must create a __________ before I can start
solving the problem.
Direction. Answer the following problems. (2 points each).
An owner of a certain resort decided to remove the pollutants on their
swimming pool. The cost C (in pesos) of removing p percent of pollutants from the
swimming pool is given by the polynomial function C(p) = 15x2 – 25x + 1500.
6. How much would it cost if you remove 20% of the pollutants in the swimming
pool?
7. What is the cost of removing 30% of the pollutants from the swimming pool?
8. If the owner decided to remove half the pollutants from the swimming pool,
how much would it cost?
9. How much does it cost if all the pollutants are removed?
10. If you are the owner, what will you do? Remove the pollutants by percent? Or
remove all the pollutants? Why?
mathematical model read write
what is asked positive substitute

9
What I Can Do
Directions: Read and analyze the situation below. Then, answer the following
questions.
You are the CEO of a big company that
sells the latest versions of gaming laptops in the
whole world. You have created a polynomial
function, G(x) = - 0.015x4 + 0.735x3 – 12.7x2 +
60.5x + 350, that tells you the relationship
between the number of gaming laptops sold (in
millions) and the time x years since 2030 (x=0 in
2030).
Perform the following:
a. Find the number of gaming laptop sold in year 2040.
b. On every gaming laptop sold, you donate 10 pesos on a certain charity that
helps those students who cannot go to school because of financial problem.
How much would you donate on the charity on the year 2035?
c. On solving the previous problem above, what did you do? Explain what you
have done.
Assessment
Let us find out how much you have learned about the topic on this lesson.
The estimated number of motorcycles, V (in thousands), in the Philippines can be
modeled by the polynomial function: V(y) = 24y3 – 15y2 + 15y – 440 where y represents
the number of years after the year 2000.
1. What is the value of y at the end of year 2007?
A. 5 B. 6 C. 7 D. 8
2. Based on the problem, V represents __________.
A. the estimated number of motorcycles.

10
B. the number of years after the year 2000.
C. the estimated number of the modeled polynomial function.
D. the number of vehicles present in the Philippines.
3. At what year after 2000 will the estimated number of motorcycles be calculated if
y = 4?
A. 2004 B. 2005 C. 2006 D. 2007
4. What is V(y) if the value of y = 4?
A. 916, 000 B. 945, 000 C. 1, 325, 000 D. 1, 536, 000
5. What is the estimated number of motorcycles at the end of year 2006?
A. 3, 147, 000 B. 4, 294, 000 C. 5, 481, 000 D. 6, 162, 000
For Items number 6 – 10, refer to the problem below.
The volume, V (in cubic feet), of a rectangular ice block is modeled by the
polynomial function V(w) = 4w3 + 13w2 – 5w where w is the width (in feet) of the ice
block.
A. the volume of the rectangular ice block.
B. the length of the rectangular ice block.
C. the width of the rectangular ice block.
D. the height of the rectangular ice block.
A. the volume of the rectangular ice block.
B. the length of the rectangular ice block.
C. the width of the rectangular ice block.
D. the height of the rectangular ice block.
8. What is V(w) if the value of w = 4?
A. 256 ft3 B. 323 ft3 C. 434 ft3 D. 516 ft3
9. What is the volume of a 2 feet wide ice block?
A. 62 ft3 B. 66 ft3 C. 70 ft3 D. 74 ft3
10. The polynomial function of the rectangular block represents what equation?
A. B. C. D.
The profit, P (in millions of pesos), for a laptop manufacturer can be modeled by P
= 3n3 + 64n where n (in millions) is the number of laptops produced. What would be the
profit of the manufacturer if it produced 3 million laptops?
11. Based on the problem, P represents __________.
A. the number of laptops produced.
B. the profit of the laptop manufacturer.
C. the 3 million laptops produced.
D. the number of manufacturers who produce laptops.
12. Based on the problem, if the value of n = 5 then the manufacturer produced how
many laptops?
A. 6 950 B. 69 500 C. 6 950 000 D. 695 000 000

11
13. What is the value of n when the manufacturer produced 3 000 000 flash drives?
A. 3 B. 300 C. 30 000 D. 3 000 000
14. What is P if the value of n = 3?
A. 192 million B. 273 million D. 342 million D. 378 million
15. What would be the profit of the manufacturer if it produced 2 million flash drives?
A. 152 million B. 168 million D. 198 million D. 216 million
Additional Activities
Activity 3: You Complete Me!
Direction: Fill up the missing parts of the solution to the problem. Copy and answer
on a separate sheet of paper.
Silvana was told that the volume of a certain block is modeled by the function
V(x) = 5x6 – 2x5 + 7x4 – 10x3 + 14x2 – 8x + 8, where x is the length in meters of the
certain block. Find the volume of a certain block with a length of 2 meters.
Procedure:
Step 1
1. _____________
2. _____________
Rewrite the given.
Step 2 3. _____________
Identify what is asked on the
problem.
Step 3
4. V (__) = 5(__)6
– 2(__)5
+ 7(__)4
–
10(__)3
+ 14(__)2
– 8(__) + 8
5. ________________
since x = 2 based on the
given.
Step 4
6. V (2) = 5(__) – 2(__) + 7(__) – 10(__) +
14(__) – 8(__) + 8
Simplify the equation.
Step 5 7. V(2) = __ - __ + __ - __ + __ - __ + __ Simplify each term.
Step 6 8. V (2) = ____
Add all values to get the final
result.
9 – 10. Answer: ______________________________________.
Activity 4: Ref! Substitute! Me Again!
profit P can be modeled by the polynomial function P(a) = -50a3 + 2400a2 –
2000, where a is the amount spent on advertising (in thousands of pesos).
What is its profit if a = 10?

12
2. The number of eggs, E(x), in a female butterfly is a function of her abdominal
width, x, in millimeters, modeled by E(x) = 14x3 – 17x2 – 16x + 34. How many
eggs can the butterfly carry if the width of her abdomen is 2 millimeters?
3. The profit P (in millions) of a certain brand of energy drink in a year is
represented by the polynomial equation P(t) = 5t3 + 20t2 – 30t – 200 where t is
the number of years. How much is the profit after 3 years?
4. If you look at the cross sections of a honeycomb, you will see patterns of
hexagons. Suppose that the number of hexagon H inside a honeycomb is
given by the polynomial function H(y) = 3y2 – y + 1 where y is the number of
layers inside the honeycomb. If there are 7 layers inside the honeycomb, how
many hexagons are present inside?
P(t) = 6t3 – 700t2 + 5000t + 14000 where t is the number of years after 2010.
What is the population of the municipality after 2015?

Lesson
2
Polynomial Functions Through
Factoring (Day 2)
What I Need to Know
through factoring;
What I Know
Mhaica is a successful agriculturist. She created hybrid crops that help a lot of
people in a certain province. Due to her creation, the businesses that involves the said
hybrid crop started to boom. The polynomial function P(x) = x3 + 2x2 – 33x – 5
represents the profit (in thousands of dollars) of a certain company that processes the
said hybrid crop where x is the number of hybrid crops processed in thousands.
Determine the number of hybrid crops processed when the company profited 85
thousand dollars.
1. What is asked on the problem?
A. Find the number of hybrid crops processed.
B. Determine the number of hybrid crops processed when the company profited
85 thousand dollars.
C. Solve for the profit when 85 thousand hybrid crops are processed.
D. Find P(x) when x is equal to 85 thousand dollars.
2. Based on the problem, P(x) represents __________.
A. the number of hybrid crops processed.
B. the number of hybrid crops Mhaica created.
C. the profit of a company that processes hybrid crops.
D. the profit Mhaica earned as the creator of the hybrid crops.

13
3. How many hybrid crops were processed when the company profited 85 thousand
dollars?
A. 3 000 B. 4 000 C. 5 000 D. 6 000
4. What number should be substituted to P(x) based on the problem?
A. 85 B. 850 C. 8, 500 D. 85, 000
5. What is the degree of the polynomial presented on the problem?
A. 2nd B. 3rd C. 4th D. 5th
A recording company has determined its daily revenue, R, by the polynomial
function R(n) = 5n3 + 125n2 – 1000n, where n represents the number of records sold.
If the company earns a revenue of 7, 500 pesos on a certain day, how many records
were sold?
6. Based on the problem, n represents __________.
A. polynomial function used to compute the revenue
B. daily revenue of the recording company
C. number of records sold
D. revenue of a certain day which is 7, 500 pesos
A. polynomial function used to compute the revenue
8. If the company earns a revenue of 7, 500 pesos on a certain day, how many
records were sold?
A. 5 B. 10 C. 20 D. 30
A. 75 B. 750 C. 7, 500 D. 75, 000
10. Based on the problem, R(n) represents __________.
A. polynomial function used to compute the weekly revenue
A box is to be shipped abroad. The volume (in cubic feet) of the box can be
expressed as the product of its three dimensions which can be represented by the
function V(w) = w3 – 2w2 – 29w – 2, where w is the measure of its width in feet. What
is the width of the box if the volume of the box is 40 ft3?
11. Based on the problem, V(w) represents __________.
A. measure of its width in feet
B. width of the box which is 40 ft3
C. dimensions of the box
D. volume of the box in cubic feet

14
12. If the volume of the box is 40 ft3, what is its width?
A. 5 ft B. 6 ft C. 7 ft D. 8 ft
What’s In
Evaluate the following polynomials function with its given value.
1. f(x) = 3x2 – 5x + 7; f (3).
2. H(s) = s3 + 4s2 – 5s + 25; H (2).
3. V(r) = 6r4 – 11r2 + 150; V (4).
What’s New
Let’s Explore
As a plant lover, you have a collection of
different kinds of cactus and succulents. A friend
of yours invited you to attend a seminar of
#Richmindset Corporation. There, you’ve learned
how to do business. Now, you decided to sell
your plants and you have profited well while
doing what you love which is planting. You’ve
learned that your earnings (in hundreds of pesos)
can be modeled by the function E(p) = 10p3 -
51p2 + 127p, where p is the number of set of
plants sold.
Were you able to apply all the necessary concepts in evaluating polynomial
function? The next activity will let you see another way of solving problems
involving polynomial functions.

15
Questions/ Tasks:
1. How much would you earn by selling 2 sets of plants?
2. If you earned 4,200 pesos, how many sets of plants did you sold?
3. Based on the second question, what is given? The money you’ve earned
by selling sets of plants or the number of sets of plants sold?
4. Still based on the second question, what did you use for substitution? 4200
or 42? Explain your answer.
Let’s try this
Read the following problems and answer the following questions:
1. The weight, w (in pounds), of a certain fish can be modeled by w = 2x2 – 5x –
5 where x is the length of the fish in decimeters. What is the length of the fish
which weighs 20 pounds?
a. Based on the problem, what are you trying to find?
b. What is the length of the fish which weighs 20 pounds?
2. Suppose that the safe stopping distance (in meters) of a car is given by
, where s represents the speed of the car in miles per hour.
Determine the safe speed of the car if it is expected to stop in 50 meters?
b. Determine the safe speed of the car if it is expected to stop in 50
meters?
3. A banker models the expected value of a newspaper company (in millions) by
the polynomial function V(n) = 3n3 + 11n2 – 204n - 20, where n is the number
of years in business. If Daily News company has an expected value of Php
120 million, how long was the company operating?
b. If Daily News company has an expected value of Php 120 million, how
long was the company operating?
4. A production company has determined its daily revenue, R, by the polynomial
function R(n) = n3 + 25n2 – 200n, where n represents the number of products
sold. If the company earns a revenue of 1, 500 pesos on a certain day, how
many products was sold?
problems and have practical uses? What do you need to solve these problems?
Enjoy learning as you proceed to the next section.

16
b. If the company earns a revenue of 1, 500 pesos on a certain day, how
many products was sold?
What Is It
The previous lesson tells us how to solve problems involving polynomial
functions through evaluation. That is, solving for the value of the dependent variable
(example of this is P(x), V(x) given the value of the independent variable. Now, we
will solve the problems using factoring, but the difference is the problems below are
more on solving for the value of the independent variable given the value of the
dependent variable. Here, we are going discuss and solve problems together step
by step using the lessons you have discussed in the previous days. The problems
presented below are things that we could relate to real-life situations
Example 1:
Suppose a windmill generates power based on the speed of the wind. This is
represented by the polynomial function , where s represents the
speed of the wind in kilometers per hour. If the windmill generated 50 units of power,
what is the speed of the wind?
Procedure:
Step 1
,
P(s) = 50 units
First let us rewrite the given.
Step 2 Find s when P(s) = 50.
Then we identify what is asked on
the problem.
Step 3
We replace P(s) with 50 since it is
given than P(s) = 50.
Step 4
We add – 50 to both sides so that
the other side is equal to zero.
Step 5 0 = (s – 10) (s + 5)
We now then solve the equation
using factoring. You could use also
quadratic equation on solving for the
value of s.
Step 6
s – 10 = 0
s + 5 = 0
We equate each factor by zero by
zero – product property and to solve
for the value of s.
Step 7 s = 10, s = - 5
By solving each linear equation, we
got s = 10 and s = - 5, but we are
Excellent! Did you have fun answering each problem? On the next section,
let us discuss similar problems step by step to know more about solving problems
involving polynomial functions through factoring.

going to reject – 5 since there is no
negative speed of the wind. Thus, we
got s = 10.
Answer: The speed of the wind should be 10 kilometers per hour to generate
50 units of power.
Example 2:
A sculptor uses ice blocks to carve the wings of a dragon. The volume, V (in
cubic centimeters), of a block of ice can be modeled by the V(t) = t3 + 8t2 – 83t,
where t represents the thickness of the block of ice in centimeters. How thick is the
block of ice with a volume of 630 cm3?
Procedure:
Step 1
V(t) = t3 + 8t2 – 83t,
V(t) = 630 cm3 First let us rewrite the given.
Step 2 Find t when V(t) = 630.
Then we identify what is asked
on the problem.
Step 3 630 = t3 + 8t2 – 83t
We replace V(t) with 630 since
it is given that V(t) = 630.
Step 4 0 = t3 + 8t2 – 83t - 630
We add – 630 to both sides so
that the other side is equal to
zero.
Step 5 0 = (t + 7) (t + 10) (t – 9)
We now then solve the
equation using factoring. You
could also use synthetic
division on solving for the value
of t.
Step 6
t + 7 = 0
t + 10 = 0
t – 9 = 0
We equate each factor by zero
by zero – product property and
to solve for the value of t.
Step 7 t = - 7, t = - 10, t = 9
By solving each linear equation,
we got t = -7, t = -10 and t = 9,
but we are going to reject – 7
and – 10 since there is no
negative measurement for
thickness. Thus, we got t = 9.
Answer: The block of ice should be 9 centimeters thick to have a volume of
630 cubic centimeters.
Great job! Now you are ready for more similar problems. Let us polish more
your skills in solving problems involving polynomial functions through factoring.

18
19
What’s More
Activity 1: Let’s Work on Second Degrees!
Direction: Answer the following questions through factoring each given polynomial
functions. (3 points each)
1. Careena likes throwing rocks at the ocean. When she throws the rock upward
from 160 ft above the ocean, h(t) = - 16t2 + 48t + 160 models the height, h, of
the rock above the ocean as a function of time, t, in seconds. How long will it
take the rock to reach the ocean (h = 0)?
2. An object moves along the horizontal in a straight line according to the function
d = 4t – 2t2, where d is the distance (in meters) and t is the time in seconds.
How long will it take the object to travel 70 meters?
3. The weight, w (in kilograms), of a certain fish can be modeled by w = x2 – 7x –
3 where x is the length of the fish in decimeters. What is the length of the fish
which weighs 15 kilograms?
4. A certain company can produce a minimum of 10 bicycles up to a maximum of
40 bicycles per week. The profit (in pesos) generated by producing and selling
n bicycles per week is given by the formula P(n) = - 5n2 + 400n – 600. How
many bicycles must be produced and sold to earn a profit of 5400 pesos in a
week?
5. Suppose that the safe stopping distance (in feet) of a car is given by
, where s represents the speed of the car in kilometers per
hour. Determine the safe speed of the car if it is expected to stop in 40 feet?
Activity 2: Let’s Up Another Degree!
Direction: Answer the following questions through factoring each given polynomial
functions. (3 points each)
1. A banker models the expected value of a company (in millions) by the
polynomial function V(n) = n3 – 3n2, where n is the number of years in
business. If a production company has an expected value of Php 50 million,
how long was the company in business?
2. In colder climates, the cost, C (in dollars), of natural gas to heat homes can
vary from one day to the next. This can be represented by the function C(d) =
2d3 – 3d2 – 32d – 3, where d is the number of days that natural gas was used
to heat homes. How many days the natural gas was used to heat a certain
home which cost them 10 dollars?
3. A box is to be mailed. The volume (in cubic inches) of the box can be
expressed as the product of its three dimensions which can be represented by

20
the function V(w) = w3 – w2 – 33w – 5, where w is the measure of its width in
inches. What is the width of the box if the volume of the box is 58 in3?
4. A production company has determined its daily revenue, R, by the polynomial
function R(n) = 6n3 + 150n2 – 1200n, where n represents the number of
products sold. If the company earns a revenue of 9 thousand pesos on a
certain day, how many products was sold?
5. It has been a while since Christine started working as a part time babysitter
and saved her earnings at the bank. The polynomial function E(y) = 100y3 +
400y2 – 1100y represents her savings, with interest, where y is the number of
years her savings stayed at the bank. How many years does it need for her
savings to reach 3000 dollars with interest?
What I Have Learned
Direction. Chose a word or phrase from the box below to fill in the missing parts.
1. In solving problems involving polynomial function through factoring, I must first
_______ the problem before listing down the given.
2. To create a polynomial function based on the given, I must ______ the given
value to its corresponding variables.
3. If I have a polynomial function already based on the given, I must arrange it in
______ form to make it easier to factor.
4. After factoring the arranged polynomial, I must equate each variable factor
equal to _____.
5. After equating all factor to zero, it is the time to ______ each linear/ quadratic
equation.
6. I must choose the answers which makes ______ or realistic.
7. If the answers include negative values, then I will _____ those values.
8. The values which are _______ are not possible since there is no negative
measurement or distance.
9. After getting to choose the answer that makes sense, I must write it in _____
sentence.
Good job! You have answered all the questions above. Now, since you are
ready, let’s move on to the next section.
zero reject sense complete
standard solve what is asked negative
one substitute what is given
negative

21
For Items 10 – 15, refer to the problem below. (3 points each).
In some parts of the world that experiences cold weather, the cost, C (in
dollar), of natural gas to heat homes can vary from one day to the next. This can be
modeled by the function C(d) = 2d3 + d2 – 27d – 1, where d is the number of days
that natural gas was used to heat homes.
10 – 12. How many days the natural gas was used to heat a certain home which
cost them 35 dollars?
13 – 15. Based on your answer on the first question, what answers are to be
rejected? Why do you have to reject it?
What I Can Do
questions.
You own a succulent plant that
propagates rapidly. You noticed that it
propagates every week and by recording the
number of seedlings, you came up with a
polynomial function that tells you how many
seedlings are there. The polynomial function
N(w) = 3w3 + 10w2 – 53w – 20 represents
the number of seedlings after w weeks. How
many weeks are needed for the succulents
to propagate up to 120 seedlings?
b. How many weeks are needed for the succulents to propagate up to 120
seedlings?

22
Assessment
Let us find out how much you have learned on this lesson. Answer all items.
Choose the letter of the correct answer to each question. Write the chosen letter on a
separate sheet of paper.
Lolita created a machine that helped a lot of people in a certain province. Due to
her invention, the businesses that uses her invention started to boom due to the low cost
of operation and maintenance using the machine. The polynomial function P(x) = 12x3 -
85x2 – 86x – 1 represents the profit (in thousands of pesos) of a certain company that
uses the machine for production where x is the number of products produced using the
machine in thousands. How many products are produced when the company profited 15
thousand pesos?
1. What is asked on the problem?
A. How many products are produced when the company profited 15 thousand
pesos.
B. Find P(x) when x is equal to 15 thousand pesos.
C. Solve for the profit when 15 thousand products are processed.
D. Find the number of products processed.
2. Based on the problem, P(x) represents __________.
A. the products are produced when the company profited 15 thousand pesos.
B. the value P(x) when x is equal to 15 thousand pesos.
C. the profit of a certain company that uses the machine for production.
D. the number of products processed.
4. How many products are produced when the company profited 15 thousand
pesos.
A. 5 000 B. 6 500 C. 8 000 D. 9 500
A. 15 B. 150 C. 1, 500 D. 15, 000
The daily revenue, R (in thousands of pesos), of sales company is modeled by
the polynomial function R(d) = 2d3 + 11d2 – 16d - 5, where d represents the number
of deals closed. If the company earns a revenue of 100, 000 pesos on a certain day,
how many closed deals were made?
6. Based on the problem, d represents __________.
A. the polynomial function used to compute the revenue.
B. the revenue of a certain day which is 100, 000 pesos.
C. the daily revenue of the sales company.
D. the number of deals closed.

23
8. If the company earns a revenue of 100, 000 pesos on a certain day, how
many closed deals were made?
A. 3 B. 4 C. 5 D. 6
A. 100 B. 1, 000 C. 10, 000 D. 100, 000
10. Based on the problem, R(d) represents __________.
A sculptor uses ice blocks to carve his masterpiece. The volume, V (in cubic
centimeters), of a block of ice can be modeled by the V(t) = 4t3 - 15t2 – 81t - 5, where
t represents the thickness of the block of ice in centimeters. How thick is the block of
ice with a volume of 65 cm3?
11. Based on the problem, V(t) represents __________.
A. the thickness of a block of ice in centimeters.
B. the thickness of a block of ice which is 65 cm3.
C. the dimensions of a block of ice.
D. the volume of a block of ice.
12. How thick is the block of ice with a volume of 65 cm3?
A. 6 cm B. 7 cm C. 8 cm D. 9 cm
14. Based on the problem, t represents __________.

24
Activity 3: Missing You!
Directions: Fill up the missing parts of the solution to the problem. Copy and answer
Alice was told that the volume of a rectangular block is modeled by the
function V(x) = 14x3 - 57x2 – 419x - 3, where x is the length in meters of a
rectangular block. How long is a rectangular block if it has a volume of 165 m3?
Procedure:
Step 1
1. _____________
2. _____________
Step 2 3. _____________
Then we identify what is
asked on the problem.
Step 3 4. _______________
5. We replace V(x) with ___
since it is given that V(x) =
___.
Step 4 0 = 14x3 - 57x2 – 419x - 168
6. We add ___ to both sides
so that the other side is
equal to zero.
Step 5
7 – 9.
0 = (_____) (______) (______)
We now then solve the
equation using factoring. You
could also use synthetic
division on solving for the
value of x.
Step 6
10.
______ = 0
______ = 0
______ = 0
We equate each factor by
zero by zero – product
property and to solve for the
value of x.
Step 7 x = , x = , x = 8
11 – 13.
By solving each linear
equation, we got x = ______,
x = ____ and x = ____, but
we are going to reject ___
and ____ since there is no
negative measurement for
length. Thus, we got x = ___.
14 – 15. Answer: ______________________________________.

25
Activity 4: Ref! Substitute! Me Again!
Directions: Answer the following question through evaluating each given polynomial
1. The weight, w (in kilograms), of a wild boar can be modeled by w = 3x2 – 21x –
9 where x is the length of the wild boar in decimeters. What is the length of the
wild boar which weighs 45 kilograms?
2. An object moves along the horizontal in a straight line according to the function
d = 2t2 – 5t, where d is the distance (in meters) and t is the time in seconds.
How long will it take the object to travel 42 meters?
3. A banker models the expected value of a company (in millions) by the
polynomial function V(n) = 5n3 – 15n2, where n is the number of years in
business. If a production company has an expected value of Php 250 million,
how long was the company in business?
profit, P (in millions of pesos), can be modeled by the polynomial function P(a)
= a3 + 2a2 – 5a - 1, where a is the amount spent on advertising (in thousands
of pesos). How much did they spent on advertising if they profited 5 million
pesos?
P(t) = 100t3 + 200t2 - 4300t where t is the number of years after 2010. On
what year will the population of the municipality have reached 14, 000
citizens?

26
Lesson
3
Modeling Polynomials
(Day 3 and 4)
What I Need to Know
2. apply polynomial functions to real-life problems and produce a concrete object
that satisfies the condition given on the problem.
What I Know
A steel company was hired to build a rectangular container for shipping. The
client wants the height of the pool to be 1 meter more than twice the width and the
length is 3 meters less than five times the width. The client also specified that the
container must have a capacity of 252 cubic meters.
1. If w represents the measurement of the width, which of the following
A. (2w - 3) (5w + 1) (w) = 252 C. (5w - 3) (2w + 1) (w) = 252
B. (w + 1) (w - 3) (w) = 252 D. (5w - 2) (3w + 1) (w) = 252
2. How wide is the container?
3. How high is the container?
4. How long is the container?
5. What are the dimensions of the swimming pool? (Follow V = LWH).
A. 17 m by 5 m by 5 m C. 12 m by 5 m by 8 m
B. 12 m by 3 m by 7 m D. 17 m by 7 m by 5 m

27
A rectangular box has a width of w feet. The height is 5 feet less than the width.
The length is 1 foot more than twice the width. If the volume of the box is 24 times
the measure of the length. What are the dimensions of the box?
A. (2w + 1) (w - 5) (w) = 24 (2w + 1)
B. (2w - 1) (w - 5) (w) = 24 (2w - 1)
C. (2w + 1) (w - 2) (w) = 24 (2w + 1)
D. (2w + 1) (w - 1) (w) = 24 (2w + 1)
7. How wide is the box?
8. How high is the box?
9. How long is the container?
10. What are the dimensions of the rectangular box? (Follow V = LWH).
A. 17 ft by 8 ft by 3 ft C. 12 ft by 7 ft by 8 ft
B. 12 ft by 3 ft by 7 ft D. 17 ft by 8 ft by 5 ft
A construction firm is asked to construct a rectangular swimming pool. The
width of the pool is 6 feet more than the depth, and the length is 10 feet more than
the depth. The pool holds 825 cubic feet of water. What are the dimensions of the
pool?
11. If d represents the measurement of the depth, which of the following
A. (d - 6) (d - 10) (d) = 825
B. (d + 6) (d + 10) (d) = 825
C. (d - 6) (d + 10) (d) = 825
D. (d + 6) (d - 10) (d) = 825
12. How wide is the swimming pool?
13. How deep is the swimming pool?
14. How long is the swimming pool?
15. What are the dimensions of the rectangular box? (Follow V = LWH).

28
What’s In
Factor each polynomials function then solve for its value.
1. f(x) = 3x2 – 4x + 7
2. H(s) = 2s3 + 13s2 + 26s + 15.
3. V(x) = x3 + 5x2 – 4x - 20.
What’s New
Let’s Explore
Nana is planning to make a sculpture
for her parents. She has a rectangular block
of wood, with a dimension 3ft x 4ft x 5ft, that
she wants to reduce in size by shaving off the
same amount from the length, width, and
height. She wants to reduce the volume of the
wood block into 24 cubic feet. What are the
dimensions of the new wood block?
Questions/ Tasks:
1. Based on the problem, create an expression that will represents the new
wood block dimensions.
a. width: _______ b. length: ________ c. height: ______
2. Create a mathematical model that represents the volume of the new
wood block. (Hint: V = lwh).
3. What are the dimensions of the new wood block?
a. width: _______ b. length: ________ c. height: ______
Were you able to apply all the necessary concepts in factoring polynomial
function? The next activity will let you see another way of solving problems
involving polynomial functions.

29
Let’s try this
1. A rectangular box has a width of w centimeters. The height is 2
centimeters less than the width. The length is 4 centimeters more than
twice the width. If the volume of the box is 8 times the measure of the
length.
a. Construct a mathematical equation that models the given from the
problem.
b. What are the dimensions of the box?
2. A rectangular solid container used in shipping goods has a volume of 84
cubic meters. A client made a special request to the manufacturer that
the length of the container must be one meter longer than the width, and
the height must be one meter longer than twice the width.
problem.
b. What are the dimensions of the container?
3. A big balikbayan box has a volume of 264 cubic feet. Its length is two
feet longer than the width, and the height is three feet longer than twice
the width.
problem.
b. What are the dimensions of the box?
What Is It
The previous lesson tells us how to solve problems involving polynomial
functions specifically on finding the maximum area given the perimeter. We first
constructed a mathematical model then solve it to determine the length and the
width. Now, we will solve similar problems, but the difference is the problems now
are all 3-dimensional objects which tells us that aside from the length and width, we
now got the height. Here, we are going discuss and solve problems together step by
step using the lessons you have discussed in the previous days. The problems
presented below are things that we could relate to real-life situations
problems and have practical uses? What do you need to solve these problems?
Enjoy learning as you proceed to the next section.

30
Example 1:
Mitzi is planning to make an ice sculpture for her parents. She has a
rectangular block of ice, with a dimension 3ft x 4ft x 5ft, that she wants to reduce in
size by shaving off the same amount from the length, width, and height. She wants
to reduce the volume of the ice block into 24 cubic feet. What are the dimensions of
the new ice block?
Procedure:
Step 1
3ft x 4ft x 5ft block of ice,
24 cubic feet as the volume
of the new ice block
Step 2
What are dimensions of the
new ice block?
Step 3
x = amount of ice to be
shaved off
We let x as the amount of ice to be
shaved off since we want to shave off
the same amount from its length, width,
and height.
Step 4 (3 – x), (4 – x), (5 – x)
We subtract x to each of the original
dimension of the ice block which is 3ft x
4ft x 5ft since it was stated on the
problem.
Step 5 (3 – x) (4 – x) (5 – x) = 24
We are now creating our mathematical
model by multiplying all the
measurements of the dimensions. You
might be asking why we multiplied the
new dimensions, remember that we
dealing with the volume of a rectangular
solid which is Volume = length x width x
height. Also, we equate it with 24 since
it is stated that the volume of the new
ice block is 24 cubic feet.
Step 6 (12 – 7x + x2) (5 – x) = 24
Then we simply the polynomial, we first
multiplying (3 – x) by (4 – x) which
resulted in 12 – 7x + x2. You could also
multiply the other terms first since
multiplication is commutative.
Step 7 60 – 47x + 12x2 – x3 = 24
Next is we multiply (12 – 7x + x2) by (5
– x) which is equal to 60 – 47x + 12x2 –
x3.
Step 8 36 – 47x + 12x2 – x3 = 0
Let us add – 24 to both sides so that
the other side will be equal to zero.
Step 9 – x3 + 12x2 – 47x + 36 = 0
Let us arrange the polynomial in
standard form so that it would be easier
to factor later on.
Step 10 x3 - 12x2 + 47x - 36 = 0
We are going to multiply -1 to both
sides so that the leading term is positive
and easier way when factoring the

31
polynomial.
Step 11 (x – 1) (x2 – 11x + 36) = 0
By factoring the polynomial, we got the
following. You could also use synthetic
division in finding the factor of the
polynomial.
Step 12
(x – 1) = 0,
(x2 – 11x + 36) = 0
We set each factor equal to zero by
zero product property.
Step 13 x = 1,
By solving for x, we get these numbers.
But is not a real number,
thus our answer is x = 1. On the case of
(x2 – 11x + 36) = 0, we used the
quadratic formula to solve for the value
of x since it is not factorable.
Step 14 2ft by 3ft by 5 ft
By substituting x = 1 on (3 – x), (4 – x),
and (5 – x), we now have the new
dimension of the ice block.
Answer: The dimensions of the new ice block is 2ft by 3ft by 5 ft.
Example 4:
A rectangular box has a width of w centimeters. The height is 2 centimeters
less than the width. The length is 4 centimeters more than twice the width. If the
volume of the box is 8 times the measure of the length. What are the dimensions of
the box?
Procedure:
Step 1
width = w
height = w – 2
length = 2w + 4
volume = 8 (2w + 4)
Step 2
What are dimensions of the
prism
Step 3 (w) (w - 2)(2w + 4) = 8 (2w + 4)
dealing with the volume of a
rectangular prism which is
Volume = length x width x height.
Also, we equate it with 8 (2w + 4)
since it is stated that the volume of the
rectangular box is 8 times the
measure of the length.

32
Step 4 (w) (w - 2) (2w + 4) = 16w + 32
We first simplify 8 (2w + 4) by
distributive property of multiplication.
Step 5 (w2 – 2w) (2w + 4) = 16w + 32
Then we simply the polynomial, we
first multiplying w by (w - 2) which
resulted in w2 – 2w. You could also
multiply the other terms first since
multiplication is commutative.
Step 6 2w3 - 8w = 16w + 32
Next is we multiply (w2 – 2w) by (2w +
4) which is equal to 2w3 - 8w.
Step 7 2w3 – 24w - 32 = 0
Let us add – 16w - 32 to both sides so
that the other side will be equal to
zero.
Step 8 w3 – 12w - 16 = 0
We multiply ½ to both sides so that
the leading term have a coefficient of
1 and to make it easier on factoring
the polynomial later.
Step 9 (w + 2) (w + 2) (w – 4) = 0
By factoring the polynomial, we got
the following. You could also use
synthetic division in finding the factor
of the polynomial.
Step 10
(w + 2) = 0,
(w + 2) = 0,
(w – 4) = 0
zero product property
Step 11 w = - 2, -2, 4
By solving for w, we get these
numbers, but we are talking about
measurement thus we reject w = - 2
since there is no negative
measurement. Hence, our answer is w
= 4
Step 12
width = 4 cm
height = 2 cm
length = 12 cm
By substituting w = 4 on width = w,
height = w – 2, and length = 2w + 4,
we got the dimension of the box.
Answer: The dimensions of the box is 12 cm by 4 cm by 2 cm. (Following LxWxH)
Great job! Now you are ready for more similar problems. Let us polish more
your skills in solving problems involving polynomial functions by making models.

33
What’s More
Activity 1: RACk my Head! (Read, Analyze, and Create)
Direction: Read and analyze each problem then create a mathematical model for
that satisfy the condition on each problem. (3 points each)
1. A construction firm is asked to construct a rectangular swimming pool. The
width of the pool is 5 feet more than the depth, and the length is 35 feet
more than the depth. The pool holds 2000 cubic feet of water.
2. On a certain ancient ruin, an archaeologist discovered a huge concrete block
with a volume of 945 cubic meters. The dimensions of the block are x meters
high by 12x – 15 meters long by 12x – 21 meters wide.
3. A sculptor plans to make a sculpture on the shape of a rectangular prism. He
wants the height and the width to be 5 inches less than the length. What
should be the dimension of the prism if he wants to use a 250 cubic inches
clay?
4. Find the length of the edge of a cube if its length is increased by 6 cm, its
width is increased by 12 cm and its height is decreased by 4 cm results in
double its volume.
5. A rectangular box has a dimension of 12 inches long, 4 inches wide, and 4
inches high. If the length and the width is decreased and the height is
increased by the same amount, a second box is formed, and its volume is
that of the original box.
Activity 2: Find Me!
Direction: Using the mathematical models you have created on Activity 1: RACk my
Head, solve each problem as stated. (3 points each)
1. A construction firm is asked to construct a rectangular swimming pool. The
width of the pool is 5 feet more than the depth, and the length is 35 feet
more than the depth. The pool holds 2000 cubic feet of water. What are the
dimensions of the pool?
high by 12x – 15 meters long by 12x – 21 meters wide. What is the height of
the block?
wants the height and the width to be 5 inches less than the length. What
should be the dimension of the prism if he wants to use a 250 cubic inches
clay?
4. Find the length of the edge of a cube if its length is increased by 6 cm, its
width is increased by 12 cm and its height is decreased by 4 cm results in
double its volume.

34
5. A rectangular box has a dimension of 12 inches long, 4 inches wide, and 4
inches high. If the length and the width is decreased and the height is
increased by the same amount, a second box is formed, and its volume is
that of the original box. Find the dimension of the second box.
What I Have Learned
Direction: Chose a word or phrase from the box below to fill in the missing parts.
1. In solving problems involving polynomial function, I must first ______ the
problem before listing down the given.
2. One of the effective ways to not forget the given is to _____ it down first.
3. Before solving the problem, I must identify first __________.
4. To evaluate a polynomial function, I would just simply ______ the given value
to its corresponding variables then solve.
5. To get the volume of a rectangular prism, I must multiply its _____, _____,
and ______.
6. After knowing what is asked, I must create a __________ before I can start
solving the problem.
7. To make it easier on factoring polynomials, it is advised to _______ the
polynomials into its standard form.
8. After factoring the arranged polynomial, I must equate each variable factor
equal to _____.
9. After equating all factor to zero, it is the time to ______ each linear/ quadratic
equation.
10. I must _____ the negative values since there is no negative measurement.
11. If I get multiple values of x, I will only consider ______ and ______ values.
12. After getting the exact value, my answer should be in ______ sentence.
Good job! You have answered all the questions above. Now, since you are ready,
let’s move on to the next section.
width mathematical model read height
complete write
length what is asked positive substitute
zero solve
reject arrange real imaginary

35
For Items 13 – 15, refer to the problem below. (3 points).
A sculptor plans to make a sculpture on the shape of a rectangular prism. He
wants the height and the width to be 3 inches less than the length. What should be
the dimension of the prism if he wants to use a 112 cubic inches clay.
What I Can Do
questions.
There is a contest on your school for a
themed school dance. Your class section came
up with an icy themed dance inspired by the
movie “Frozen”. You and your team were
assigned to create props for the said contest, and
you came up with a pyramid ice sculpture idea.
So, you are to create an ice mold in a shape of a
pyramid with a height of 2 feet greater than the
length of each side of its square base. The
volume of the pyramid should be 15 cubic feet.
Perform the following:
a. Create a mathematical model that satisfy the conditions given on the problem
above. (Hint: , where a = edge of the base of the pyramid and h = height of
the pyramid)
b. What are the dimensions of the pyramid?
c. Suppose you increase all the dimensions by 1 foot each. How big is capacity
of the new pyramid? Compared to the original pyramid, which is bigger? By
How much?

36
Assessment
Let us find out how much you’ve learned about the topic on this lesson.
A factory needs a box with a capacity of 1728 cubic inches. The length of the
box should be 6 inches greater than the height and the width should be 4 inches less
than the height. What are the dimensions of the box?
1. If h represents the measurement of the height, which of the following
A. (h + 6) (h + 4) (h) = 1728 C. (h + 6) (h - 4) (h) = 1728
B. (h - 6) (h - 4) (h) = 1728 D. (h - 6) (h + 4) (h) = 1728
A. 4 inches B. 6 inches C. 8 inches D. 10 inches
4. How long is the box?
5. What are the dimensions of the box? (Follow V = LWH).
A. 17 in by 12 in by 5 in C. 18 in by 8 in by 12 in
B. 18 in by 3 in by 7 in D. 17 in by 7 in by 5 in
A candy factory needs a box with a volume of 420 cubic inches. The height
should be 2 inches less than the width and the length is 5 inches greater than the
width. What are the dimensions of the box?
A. (w - 2) (w + 5) (w) = 420 C. (w + 2) (w - 5) (w) = 420
B. (w + 2) (w + 5) (w) = 420 D. (w - 2) (w - 5) (w) = 420
9. How long is the box?
10. What are the dimensions of the box? (Follow V = LWH).
A. 15 in by 12 in by 5 in C. 18 in by 8 in by 12 in
B. 12 in by 3 in by 7 in D. 12 in by 7 in by 5 in

37
In 1980, archaeologists at the ruins of Caesara discovered a huge hydraulic
concrete block with a volume of 1638 cubic feet. The block’s dimension is x feet
wide, 3x + 5 long, and 2x – 5 high. Find the dimensions of the block.
11. If x represents the measurement of the width, which of the following
A. (3x + 6) (2x - 5) (x) = 1638
B. (3x + 5) (2x - 5) (x) = 1638
C. (3x - 5) (2x - 5) (x) = 1638
D. (3x - 6) (2x + 5) (x) = 1638
12. How wide is the hydraulic concrete block?
13. How high is the hydraulic concrete block?
14. How long is the hydraulic concrete block?
15. What are the dimensions of the hydraulic concrete block? (Follow V = LWH).
Activity 3: Put It in The Parts!
Directions: Fill up the missing parts of the solution to the problem. Copy and answer
A candy factory needs a box with a volume of 308 cubic inches. The height
should be 5 inches less than the thrice the width and the length is 3 inches greater
than the twice the width. What are the dimensions of the box?
Procedure:
Step 1
1. _____________
2. _____________
3. _____________
4. _____________
Step 2
What are the dimensions of the
box?
Step 3 5. _______________

38
dealing with the volume of a
rectangular prism which is
Volume = length x width x height.
Step 4 6. (________) (2w + 3) = 308
Let us simply the polynomial, we first
multiplying w by (3w - 5) which
resulted in _______.
Step 5 6w3
– w2
– 15w = 308
We multiply 3w2 – 5w by 2w + 3 which
resulted in 6w3
– w2
– 15w.
Step 6 7. _____________
8. Let us add _____ to both sides so
that the other side will be equal to
zero.
Step 7 9. (______) (_________) = 0
By factoring the polynomial, we got
the following. You could also use
synthetic division in finding the factor
of the polynomial.
Step 8
10. ______ = 0
11. ______ = 0
zero product property
Step 9
12. w = ____
13. w = ± ________
By solving for w, we get these
numbers. We will reject the other 2
answers since they are imaginary
numbers.
Step 10 14. __________
By substituting w = 4 on width = w,
height = 3w – 5, and length = 2w + 3,
we got the dimension of the box.
15. Answer: ______________________________________.
Activity 4: Creating Models!
Direction: Read and analyze each problem then create a mathematical model for that
satisfy the condition on each problem. (3 points each)
1. A factory needs a box with a capacity of 1320 cubic inches. The length of the
box should be 7 inches greater than twice the height and the width should be 4
inches less than the height.
wants the height and the width to be 10 inches less than the length.
high by 2x – 15 meters long by 5x – 21 meters wide.
4. A rectangular solid container used in shipping goods has a volume of 65 cubic
meters. A client made a special request to the manufacturer that the length of
the container must be five meters longer than twice the width, and the height
must be one meter shorter than the width.

39
5. A big balikbayan box has a volume of 520 cubic feet. Its length is two feet
longer than thrice the width, and the height is three feet shorter than twice the
width.
Summary
• On solving word problems involving polynomials, we must consider first
these steps. These are not just applicable in solving word problems
involving polynomials but also to any word problems.
a. How to use a problem-solving strategy to solve word problems.
i. Read the problem. Make sure all the words are understood.
ii. Identify what the give and what we are looking for.
iii. Name what we are looking for. Choose a variable to
represent quantity.
iv. Translate into mathematical model. It may be helpful to
restate the problem in one sentence will all the important
information. Then, translate the English sentence in to
equation.
v. Solve the equation using appropriate algebra techniques.
vi. Check the answer in the problem and make sure it makes
sense.
vii. Answer the question with a complete sentence and label
your answers.

40
Assessment: (Post-Test)
Directions: Choose the letter of the correct answer. Write the chosen letter on a
separate sheet of paper.
1. A sofa set dealer determines that its profit, P, in thousands of pesos, can be
modeled by the function P(x) = 0.0012x3 + 2x – 25, where x represents the number
of sofa set sold. What is the profit when x = 20?
A. Php 24, 600 B. Php 25, 300
C. Php 26, 700 D. Php 27, 900
2. In this school year, 100 high school students participated in one-week Human vs
Zombie game. The number of zombies, Z, after d days of playing can be modeled
by the function Z(d) = 5d3 – 3d2 + 15. How many days did it take for the number of
zombies to reach 43?
A. 1 B. 2 C.3 D. 4
3. Edd is going to throw a rock from the top of a trail overlooking the ocean. When he
throws the rock upward from 160 ft above the ocean, the function
h(t) = -16t2 + 48t + 160 models the height, h, of the rock above the ocean as a
function of time, t. Find the height of the rock at t = 2 seconds.
A. 148 ft B. 164 ft C. 180 ft D. 192 ft
4. The estimated number of electric motorcycles, V (in thousands), in the Philippines
can be modeled by the polynomial function:
V(y) = 0.15128y3 – 3.28234y2 + 23.7565y – 2.041 where y represents the number
of years after the year 2005. Find the estimated number of electric motorcycles at
the end of the year 2008. Round up to the nearest thousands.
A. 42, 000 B. 43, 000
C. 44, 000 D. 45, 000
5. The weight, w (in kilograms), of a certain crab can be modeled by w = 0.00304x3,
where x is the length of the arm span of the crab in inches. What is the weight of a
crab with an arm span of 12 inch?
A. 5.00 kg B. 5.25 kg C. 5.50 kg D. 5.75 kg
6. The profit, P (in millions of pesos), for a flash drive manufacturer can be modeled
by P = n3 + 2n2 - 23n where n (in millions) is the number of flash drive produced.
How many flash drives was produced if the profit reached 60 million pesos?
A. 3, 000, 000 B. 4, 000, 000
C. 5, 000, 000 D. 6, 000, 000
7. The volume, V (in cubic feet), of a rectangular wood block is modeled by the
polynomial function V(w) = 12w3 – 38w2 – 104w where w is the width (in feet) of the
wood block. What is the width of the wood block if its volume is 30 cubic feet?
8. During a 10-year period, the amount (in millions of pesos) of school supplies (S)
sold can be modeled by S(t) = - 10t3 + 25t2 – 140t + 332, where t is in years. Find
the amount of school supplies sold in 3 years.
A. Php 794, 000, 000 B. Php 796, 000, 000
C. Php 795, 000, 000 D. Php 797, 000, 000

41
On a glass factory, paperweights are created by pouring molten glass into molds.
Each mold is a rectangular prism with a height 5 cm greater than the length of each side
of its square base. Each mold holds 1008 cubic centimeters of glass.
9. If x represents the length of each side of the square base, which of the following
A. (x + 5) (x) = 1008 B. (x + 5) (x) (x) = 1008
C. (x + 5) (x + 5) (x) = 1008 D. 1008 (x + 5) = (x) (x)
10. What is the height of the glass mold?
A. 5 cm B. 7 cm C. 12 cm D. 16 cm
11. What are the dimensions of the glass molds? (Follow V = LWH)
A. 7 cm by 5 cm by 12 cm B. 7 cm by 12 cm by 12 cm
C. 7 cm by 7 cm by 12 cm D. 7 cm by 8 cm by 8 cm
A construction company was hired to build a swimming pool for an attraction and
high lights in a wedding venue. The client wants the width of the pool to be 2 meters less
than the depth and the length is 10 meters more than the depth. The client also specified
that the pool must have a water capacity of 595 cubic meters.
12. If d represents the measurement of the depth, which of the following mathematical
model satisfy the condition of the above problem?
A. (d - 2) (d + 2) (d) + 10 = 595 B. (d - 2) (d - 10) (d) = 595
C. (d - 10) (d + 2) (d) = 595 D. (d - 2) (d + 10) (d) = 595
13. How deep is the pool?
14. How long is the pool?
15. What are the dimensions of the swimming pool? (Follow V = LWH)
A. 17 m by 5 m by 7 m B. 12 m by 2 m by 7 m
C. 12 m by 5 m by 7 m D. 17 m by 8 m by 5 m

Lesson 1 What In
Number
Lea
ding
ter
m
End Behavior
Y
intercept
Number
of turning
points
1 X8 Up – left,
Up – right
9 7
2 X7 Down – left,
Up – right
56 6
3 -X3 Down – right,
Up - left
0 2
Lesson 1 What’s New
1A. 15 wild boars
1B. They are not the same since if
you use the polynomial function the
answer is with decimal which is not
realistic because boars are counted
as a whole.
1C. Since we don’t have restrictions
and not considering other variables
that might happen, we can predict
the number of wild boars in the 10th
year
Lesson 1 Let’s Try this
1 a. 6425 b. 9900
2 a. 208.9L b. 196.2L
3 a. P 33, 500 b. P 269, 500
Lesson 1 What’s More Activity 1
1. 30.4 carats
2. Php 407 600
3. 4, 714, 000
4. 594 eggs
5. 35 balls
1. P 1, 380, 000, 000
2. 71 hexagons
3. 132, 674 residents
4. 1000 units
5. 7293 cable TV systems
Lesson 1 What I Know
1 A 6 C 11 B
2 A 7 A 12 D
3 D 8 D 13 A
4 B 9 A 14 D
5 D 10 D 15 C
Lesson 1 What I Have Learned
1. Read
2. Write
3. What is Asked
4. Substitute
5. Mathematical Model
6. P 7, 500
7. P 14, 250
8. P 37, 750
9. P 149, 000
10. Remove all the pollutants
since if I do it by percent it
would be very costly in the
long run
Lesson 1 What Can I Do
a. 5, 715, 000, 000 laptops
b. 41, 750, 000, 000 pesos
c. After evaluating the polynomial
when n = 5, I’ve multiplied the result
by 10 since 1 laptop sold gets 10
pesos donation.
Lesson 1 Assessment
1 C 6 C 11 B
2 A 7 A 12 D
3 A 8 C 13 A
4 A 9 D 14 B
5 B 10 D 15 A
42
Key to Answers

Lesson 1 Additional Act. 3
1 – 2. x = 2, V(x) = 5x6 – 2x5 + 7x4
– 10x3 + 14x2 – 8x + 8
3. Find the volume of a certain
block with a length of 2 meters.
4. V (2) = 5(2)6 – 2(2)5 + 7(2)4 –
10(2)3 + 14(2)2 – 8(2) + 8
5. Substitute x with 2
6. V (2) = 5(64) – 2(32) + 7(16) –
10(8) + 14(4) – 8(2) + 8
7. V (2) = 320 - 64 + 112 – 80 +
56 – 16 + 8
8. V (2) = 336
9 – 10. The volume of the block is
336 m3 when its length is 2
meters.
1. P 188, 000
2. 14 eggs
3. P 25, 000, 000
4. 141 hexagons
5. 22, 250 residents
Lesson 2 What In
1. 19
2. 47
3. 1510
1. P 13, 000
2. 7 sets
3. The money you’ve earned by
selling sets of plants
4. 42 since the problem states that
E(p) is in hundreds of pesos
1 a. What is the length of the fish
which weighs 20 pounds?
b. 5 decimeters
2 a. Determine the safe speed of the
car if it is expected to stop in 5o
meters.
b. 7 miles per hour
3 a. How long was the daily news
operating if it is expected value is
120 million?
b. 7 years
4. a. how many products were sold
if the company earns 1500.
b. 10 products
1. 5 seconds
2. 7 seconds
3. 9 decimeters
4. 20 bicycles
5. 20 kph
1 B 6 C 11 D
2 C 7 B 12 C
3 D 8 B 13 D
4 A 9 C 14 A
5 B 10 B 15 B
1. Read
2. Substitute
3. Standard
4. Zero
5. Solve
6. Sense
7. Reject
8. Negative
9. Complete
10 – 12. 4 days
13 – 15. d = -3, d = -3/2 since
there is no negative number of
days.
1. 5 years
2. A
3. 7 inches
4. 10 products
5. 3 years
43

a. the number of weeks needed for
the succulents to propagate up to
120 seedlings.
b. 4 weeks
Lesson 2 Assessment
1 A 6 D 11 D
2 C 7 C 12 B
3 B 8 A 13 D
4 C 9 A 14 A
5 A 10 C 15 B
1 – 2. V(x) = 14x3 - 57x2 – 419x –
3, V(x) = 165 m3
3. How long is a rectangular block
if it has a volume of 165 m3
4. 165 = 14x3 - 57x2 – 419x – 3
5. V(x) = 165
6. - 165
7 – 9. 0 = (x – 8) (2x – 7) (7x – 3)
10. x – 8 = 0, 2x – 7 = 0, 7x – 3 = 0
11 - 13. x = 8, x = -3/7, x = -7/2
-3/ 7, -7/2, 8
14 – 15. The length of the
rectangular block is 8 m if the
volume is 165 m3.
1. 9 decimeters
2. 6 seconds
3. 5 years
4. P 2 000
5. 7 years
Lesson 3 What In
1. f(x) = (3x – 7)(x + 1);
x = 7/3, x = -1
2. H(s)=(x +1)(x + 3)(2x + 5);
x = -1, -3, -5/2
3. V(x)=(x + 5)(x + 2)(x - 2);
x = -5, 2, -2
1. a. 3 – x, b. 4 – x, c. 5 – x
2. (3 – x) (4 – x) (5 – x) = 24
3. w = 2, l = 3, h = 4
1 a. (w) (w – 2) (w + 4) = 8 (w + 4)
b. 12 cm by 4 cm by 2 cm
2 a. (w) (w + 1) (2w + 1) = 84
b. 4 cm by 3 cm by 7 cm
3 a. (w) (w + 2) (2w + 3) = 264
b. 6 ft by 4 ft by 11 ft
1. (d) (d + 5) (d + 35) = 2000
2. (x) (12x – 15) (12x – 21) =
945
3. (x) (x – 5) (x – 5) = 250
4. (e + 6) (e + 12) (e – 4) = 2e3
5. (12 – x) (4 – x) (4 + x) =
1 C 6 A 11 B
2 A 7 C 12 C
3 D 8 A 13 C
4 A 9 B 14 A
5 B 10 A 15 A
1. 40 ft by 10 ft by 5 ft
2. 21 m by 15 m by 3m
3. 10 in by 5 in by 5 in
4. e = 6cm or e = 12 cm
44

1. Read
2. Write
3. What is asked
4. Substitute
5. Length, width, height
6. Mathematical model
7. Arrange
8. Zero
9. Solve
10. Reject
11. Positive, real
12. Complete
13 – 15. 7 in by 4 in by 4 in
1. a or 45 = a2 (a + 2)
or a3 + 2a2 – 45 = 0
2. 3 ft by 3 ft by 5 ft
3. V = 32 cubic feet, the new
pyramid is bigger by 17 cubic
feet
Lesson 3 Assessment
1 C 6 A 11 B
2 C 7 C 12 B
3 D 8 A 13 C
4 D 9 A 14 D
5 C 10 D 15 B
1 – 4. h = 3w – 5, l = 2w + 3, w =
w, V = 308 in3
5. (2w + 3) (w) (3w – 5) = 308
6. 3w2 – 5w
7. 6w3 – w2 – 15w – 308 = 0
8. – 308
9. (w - 4) (6w2 + 23w + 77) = 0
10 – 11. w – 4 = 0, 6w2 + 23w +
77 = 0
12. w = 4
13. w = -23/12 ±
15. the dimension of the box is 11
in by 4 in by 7 in.
1. (2h + 7) (h – 40) (h) = 0
2. V = (l – 10) (l – 10) (l)
3. (2x – 15) (5x – 21) (x) = 1935
4. (2w + 5) (w) (w – 1) = 65
5. (3w + 2) (w) (2w + 3) = 520
Assessment (Pre)
1 B 6 A 11 B
2 B 7 A 12 C
3 D 8 C 13 C
4 A 9 B 14 B
5 B 10 D 15 D
Assessment (Post)
1 A 6 C 11 B
2 B 7 B 12 D
3 D 8 D 13 D
4 C 9 C 14 B
5 B 10 C 15 A
45

46
References
Callanta, Melvin M., [et.al.]. Mathematics - Grade 10 Learner’s Module. Manila City:
Rex Book Store, Inc., 2015.
Cabral, Emmanuela A., [et.al.]. Precalculus. Quezon City: Ateneo de Manila
University Press, 2010.
Oronce, Orlando A., and Marilyn O. Mendoza. E-math: Worktext in Mathematics 10. Manila
City: Rex Book Store, Inc., 2015.

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DepEd Division of Bukidnon
Fortich St., Sumpong, Malaybalay City, Bukidnon
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