This document provides instruction on factoring polynomials. It covers several factoring methods including common monomial factoring, difference of squares, sum and difference of cubes, perfect square trinomials, and general trinomials. Examples are provided for each method. The objectives are to determine appropriate factoring methods, factor polynomials completely using various techniques, and solve problems involving polynomial factors.
GR 8 Math Powerpoint about Polynomial Techniquesreginaatin
-This is a powerpoint inspired by one of Canva displayed presentation.
- This is about Math Polynomials and good for highschoolers presentation for school.
- It consists of 39 pages explaining each of the Polynomial Techniques.
- Good for review or inspired powerpoint.
GR 8 Math Powerpoint about Polynomial Techniquesreginaatin
-This is a powerpoint inspired by one of Canva displayed presentation.
- This is about Math Polynomials and good for highschoolers presentation for school.
- It consists of 39 pages explaining each of the Polynomial Techniques.
- Good for review or inspired powerpoint.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
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3. After going through this lesson, you are expected to:
- determine the appropriate factoring methods and be
able to factor out the given polynomials completely;
- factor the given polynomials with utmost accuracy using
a variety of techniques and strategies; and
- solve problems involving factors of polynomials.
Objectives
4. Recall: Special Products
Column A Column B
1. 3𝑥 2𝑥 − 5 A. 𝑥2 + 4𝑥𝑦 + 4𝑦2
2. (𝑥 + 2𝑦)2 B. 3𝑥2 + 11𝑥𝑦 + 6𝑦2
3. 𝑥 − 3 𝑥 + 2 C. 6𝑥2 − 15𝑥
4. 3𝑥 + 2𝑦 𝑥 + 3𝑦 D. 𝑥2
− 𝑥 − 6
5. 𝑥 − 4 𝑥 + 4 E. 𝑥2 − 16
6. G I N OT C A R F
FACTORING
It is the reverse process of
multiplication.
7. M I A LT I R N O
TRINOMIAL
An expression that consists
three terms.
8. LY A L I P O N O M
POLYNOMIAL
It is an expression consisting of variables
and coefficients, that involves
operations and non-negative integer
exponents of variables.
9. N O I B L A I M
BINOMIAL
An expression that consists two
terms.
10. E CT R E P F Q U A S R E
PERFECT SQUARE
It is a product of a polynomial
multiplied by itself.
11. Factoring Polynomials
Factoring is an inverse process of
multiplication. Through factoring, we
write polynomials in simpler form and
use it as a way of solving the roots of
an equation.
12. Factoring Polynomials
A. Common Monomial Factor
B. Sum and Difference ofTwo Squares
C. Sum and Difference ofTwo Cubes
D. Perfect SquareTrinomials
E. Grouping / GeneralTrinomials
13. A. Common Monomial Factor (CMF)
Example #1: Factor 3𝑥 − 12.
Solution:
• The CMF/GCF of 3x and 12 is
• Divide both terms by 3.
3𝑥
3
−
12
3
= x − 4
• Answer: 3(𝒙 − 𝟒)
3
factors
14. A. Common Monomial Factor (CMF)
Example #2: Factor 6c3d – 12c2d2 + 3cd.
Solution:
• The CMF/GCF of the three terms is
• Divide the three terms by 3cd.
6c3d
𝟑𝐜𝐝
−
12c2d2
𝟑𝐜𝐝
+
3cd
𝟑𝐜𝐝
= 2c2 − 4cd + 1
Answer: 3cd(2c2 – 4cd + 1)
3cd
factors
15. A. Common Monomial Factor (CMF)
Example #3: Factor 5x2 – 10x + 35.
Solution:
• The CMF/GCF of the three terms is
• Divide the three terms by 5.
5x2
𝟓
−
10x
𝟓
+
35
𝟓
= x2 − 2x + 7
Answer: 5(x2 – 2x + 7)
5
factors
25. C. Sum and Difference ofTwo Cubes
Sum of Two Cubes:
Pattern: a3 + b3 =
Difference of Two Cubes:
Pattern: a3 – b3 =
(a2 – ab + b2)
(a + b)
+ +
–
(a2 + ab + b2)
(a – b)
– +
+
26. Example #1: Factor x3 + 64.
Solution: x3 + 64 = (x+4)(x2 – 4x + 42)
Answer: (x + 4)(x2 – 4x + 16)
cube root of x3
cube root of 64
square of x
square of 4
product of x and 4
+ +
–
Sum of Two Cubes
27. Example #2: Factor y3 + 27.
Solution: y3 + 27 = (y+3)(y2 – 3y + 32)
Answer: (y + 3)(y2 – 3y + 9)
Sum of Two Cubes
cube root of 27
square of y
square of 3
product of y and 3
cube root of y3
+ +
–
28. Example #1: Factor 8y3 – 125.
Solution: 8y3 – 125 = (2y – 5)(4y2 + 10y + 52)
Answer: (2y – 5)(4y2 + 10y + 25)
cube root of 8y3
cube root of 125
square of 2y
square of 5
product of 2y and 5
– +
+
Difference of Two Cubes
29. Example #2: Factor 8c3 – d3.
Solution: 8c3 – d3 = (2c – d)(4c2 + 2cd + d2)
cube root of 8c3
cube root of d3
square of 2c
square of d
product of 2c and d
– +
+
– +
+
Difference of Two Cubes
30. Complete the answer by finding the missing factor in each of the following.
1) 7x2 + 14x = 7x (______)
(______) (x – 9)
2) x2 – 81 =
(________) (9c2 – 15c + 25)
3) 9c3 + 125 =
(m – 3) (_______________)
4) m3 – 27 =
x + 2
x + 9
3c + 5
m2 + 3m + 9
31. D. Perfect SquareTrinomials
Patterns: a2 + 2ab + b2 = (a + b)2
a2 – 2ab + b2 = (a – b)2
Conditions:
1. The first and last terms are both perfect
squares.
2. The middle term is twice the product of the
square root of the first and last terms.
32. D. Perfect SquareTrinomials
Patterns: a2 + 2ab + b2 = (a + b)2
a2 – 2ab + b2 = (a – b)2
Example #1: Factor x2 + 6x + 9.
Solution: (x + 3) (x + 3)
*Twice the product of the roots 3 and x is 6x.
Answer: (x + 3)2
6x
6x
33. D. Perfect SquareTrinomials
Patterns: a2 + 2ab + b2 = (a + b)2
a2 – 2ab + b2 = (a – b)2
Example #2: Factor 4x2 – 20xy + 25y2.
Solution: (2x – 5y)(2x – 5y)
*Twice the product of the roots 2x and -5y is –20xy.
Answer: (2x – 5y)2
– 20xy
–20xy
34. D. Perfect SquareTrinomials
Patterns: a2 + 2ab + b2 = (a + b)2
a2 – 2ab + b2 = (a – b)2
Example #3: Factor 4x2 – 12x + 9.
Solution: (2x – 3) (2x – 3)
*Twice the product of the roots 2x and -3 is –12x.
Answer: (2x – 3)2
– 12x
–12x
35. E. GeneralTrinomials
*To find the factors, you can use reverse foil method or
trial and error.
Case 1: a = 1
Example #1: Factor x2 + 3x – 18.
*What are the factors of 18 that when added/subtracted is 3?
*Factors of 18: 18 and 1, 9 and 2, 6 and 3
*Trial and error. (x +/- ___) (x +/- ___)
Answer: (x + 6)(x – 3)
36. E. GeneralTrinomials
Case 1: a = 1
Example #2: Factor x2 + 2x – 24.
*What are the factors of 24 that when added/subtracted
is 2?
*Factors of 24: 24 and 1, 12 and 2, 8 and 3, 6 and 4
*Trial and error. (x +/- ___) (x +/- ___)
Answer: (x + 6)(x – 4)
37. E. GeneralTrinomials
Case 2: a˃1
Example #1: Factor 3x2 + 14x + 8.
*Factors of 8: 8 and 1, 4 and 2
*Trial and error. (3x + ___)(x + ___)
Answer: (3x + 2)(x + 4)
38. E. GeneralTrinomials
Case 2: a˃1
Example #2: Factor 5x2 + 30x + 12.
*Factors of 12: 12 and 1, 6 and 2, 4 and 3
*Trial and error. (5x + ___)(x + ___)
Answer: (5x + 2)(x + 6)
41. Word Problem
Find two consecutive integers whose product is 72.
Representation: Let n represent one integer, then n + 1
represents the next integer.
Solution: n(n + 1) = 72
n2 + n = 72
n2 + n – 72 = 0
(n + 9)(n – 8) = 0
n = -9 n = 8
If n = -9, then n + 1 = -9 + 1 = -8.
If n = 8, then n + 1 = 9.
Thus, the consecutive integers are
-9 and -8 or 8 and 9.
42. Asynchronous Activities
Activity 1: Factoring Polynomials
GForm Link:
Reflection 1: Answer the questions in 2-3 sentences.
1. What is the most significant part of the lesson today?
2. Do you have any difficulty/ies in understanding the lesson?
What do you think will help you cope up with these
difficulty/ies?