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1. (x +4)2
2. (x +5)2
3. (x +7)2
4. (x - 9)2
5. (x - 11)2
=x2 +8x +16
=x2 +10x +25
=x2 +14x +49
=x2 - 18x +81
=x2 - 22x +121
Drill
3. find pleasure in factoring perfect square
trinomials.
Guided Questions:
1. What is a trinomial? A perfect square trinomial?
2. How can we identify a perfect square trinomial?
3. How will you differentiate a perfect square trinomial
from an ordinary trinomial?
4. What do you think the factors of a perfect square
trinomial? Is it a trinomial also? Defend your answer.
Perfect square trinomials
are algebraic polynomials
that can be factored into the
square of a binomial.
The first criteria of a Perfect
Square Trinomial is that it must
have three terms.
x2 +8x +16
The first term must be a perfect square
x2 =( x )( x )
x2 +8x +16
The third term must be a perfect square
16 =( 4 )( 4 )
x2 +8x +16
The middle term must be twice the
product of the square root coefficient
of the first and last term.
(2)(1)(4) =8
x2 +8x +16
1. r2 –8r +16 YES NO
2. x2 –14x +49 YES NO
3. d2 +50d +225 YES NO
4. x2 +2x +1 YES NO
5. b2 –5b +36 YES NO
Perfect Square Trinomial
Yes or No?
Study the trinomials and their corresponding
binomial factors.
1. r2 – 8r +16 = ( r –4 )2
2. x2 –14x + 49 = ( x –7 )2
4. x2 + 2x +1 = ( x +1)2
WHAT IF IT IS A PERFECT
SQUARE TRINOMIAL?
Ifyou have a perfect Square Trinomial it is
easy to factor:
•Take the square root of the first term.
•Take the square root of the last term.
•Use the sign of the middle term, put in
parenthesis and square the result.
x2 + 4x + 4
x
(x+2)2 =(x+2) (x+2)
x2 + 4x + 4 = (x+2) (x+2) Factors
2
+
Example:
+
= ( x
2
5 )
Another example:
x2 +10x +25
Matching Type
Group Activity
4x2 + +25
= (2x+5)2
10x
Group Activity
x2 + +16
= (x+4)2
8x
Individual Activity
Factor the following square trinomials.
1. x2 – 10x +25
2. b2 – 20b +100
3. 36b2 – 12b +1
4. 49p2 – 56p +16
5. 49k2 – 28kp +4p2
A garden has an area x2 - 20x + 100
square meters. What is the length of
each side of the garden?
(Answer the word problem using
factoring.)
Let’s Try This!
In factoring a perfect square trinomial, the following
should be noted:
1. The factors are binomials with like terms wherein the
terms are the square roots of the first and the last terms
of the trinomial.
2. The sign connecting the terms of the binomial factors
is the same as the sign of the middle term of the
trinomial.
Remember!
Evaluation
A. Identify the given trinomial if it’s a perfect square
trinomial or not. If not explain your answer.
Evaluation
B. Factor the following square trinomials.
1. x2 +4x +4
2. x2 - 18x +81
3. 4a2 +4a +1
4. 25m2 – 30m +9
5. 9p2 – 24p +16
Factor completely each of the following
expression.
1. x2 + 10x + 25
2. a2 - 8a + 16
3. 9x2 + 6xy + y2
4. x2 + 2x + 1
5. 169 + 26b + b2
Seatwork
Homework
Factor completely each of the following
expression.
1. x2 –x +1/4
2. 36m2 - 84m +49
3. 4x2 - 12x +9
4. p2 +30p +225
5. 64x2 - 176x +121

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Factoring of Perfect Square Trinomial.pptx

  • 1.
  • 2. 1. (x +4)2 2. (x +5)2 3. (x +7)2 4. (x - 9)2 5. (x - 11)2 =x2 +8x +16 =x2 +10x +25 =x2 +14x +49 =x2 - 18x +81 =x2 - 22x +121 Drill
  • 3. 3. find pleasure in factoring perfect square trinomials.
  • 4. Guided Questions: 1. What is a trinomial? A perfect square trinomial? 2. How can we identify a perfect square trinomial? 3. How will you differentiate a perfect square trinomial from an ordinary trinomial? 4. What do you think the factors of a perfect square trinomial? Is it a trinomial also? Defend your answer.
  • 5. Perfect square trinomials are algebraic polynomials that can be factored into the square of a binomial.
  • 6. The first criteria of a Perfect Square Trinomial is that it must have three terms. x2 +8x +16
  • 7. The first term must be a perfect square x2 =( x )( x ) x2 +8x +16
  • 8. The third term must be a perfect square 16 =( 4 )( 4 ) x2 +8x +16
  • 9. The middle term must be twice the product of the square root coefficient of the first and last term. (2)(1)(4) =8 x2 +8x +16
  • 10. 1. r2 –8r +16 YES NO 2. x2 –14x +49 YES NO 3. d2 +50d +225 YES NO 4. x2 +2x +1 YES NO 5. b2 –5b +36 YES NO Perfect Square Trinomial Yes or No?
  • 11.
  • 12.
  • 13. Study the trinomials and their corresponding binomial factors. 1. r2 – 8r +16 = ( r –4 )2 2. x2 –14x + 49 = ( x –7 )2 4. x2 + 2x +1 = ( x +1)2
  • 14. WHAT IF IT IS A PERFECT SQUARE TRINOMIAL? Ifyou have a perfect Square Trinomial it is easy to factor: •Take the square root of the first term. •Take the square root of the last term. •Use the sign of the middle term, put in parenthesis and square the result.
  • 15. x2 + 4x + 4 x (x+2)2 =(x+2) (x+2) x2 + 4x + 4 = (x+2) (x+2) Factors 2 + Example:
  • 16. + = ( x 2 5 ) Another example: x2 +10x +25
  • 18. Group Activity 4x2 + +25 = (2x+5)2 10x
  • 19. Group Activity x2 + +16 = (x+4)2 8x
  • 20. Individual Activity Factor the following square trinomials. 1. x2 – 10x +25 2. b2 – 20b +100 3. 36b2 – 12b +1 4. 49p2 – 56p +16 5. 49k2 – 28kp +4p2
  • 21. A garden has an area x2 - 20x + 100 square meters. What is the length of each side of the garden? (Answer the word problem using factoring.) Let’s Try This!
  • 22. In factoring a perfect square trinomial, the following should be noted: 1. The factors are binomials with like terms wherein the terms are the square roots of the first and the last terms of the trinomial. 2. The sign connecting the terms of the binomial factors is the same as the sign of the middle term of the trinomial. Remember!
  • 23. Evaluation A. Identify the given trinomial if it’s a perfect square trinomial or not. If not explain your answer.
  • 24. Evaluation B. Factor the following square trinomials. 1. x2 +4x +4 2. x2 - 18x +81 3. 4a2 +4a +1 4. 25m2 – 30m +9 5. 9p2 – 24p +16
  • 25. Factor completely each of the following expression. 1. x2 + 10x + 25 2. a2 - 8a + 16 3. 9x2 + 6xy + y2 4. x2 + 2x + 1 5. 169 + 26b + b2 Seatwork
  • 26. Homework Factor completely each of the following expression. 1. x2 –x +1/4 2. 36m2 - 84m +49 3. 4x2 - 12x +9 4. p2 +30p +225 5. 64x2 - 176x +121