1. Factor each trinomial.
1. 16x2 + 40x + 25
(4x + 5)(4x + 5)
2. 9x2 – 25y2
(3x + 5y)(3x – 5y)

2. Objectives
Combine methods for factoring a polynomial.

3. Choosing a Method Is it a difference of two squares?
Step 1
Is it a difference of two squares?
Step 2
Should you group it? (four terms)
Step 3
Is there a GCF for each term?
Step 4
Is it a perfect square trinomial?

5. Finished =
cannot be factored any more.

6. Factor
10x2 + 48x + 32

7. Factor
8x6y2 – 18x2y2

8. Factor
4x3 + 16x2 + 16x

9. Factor
2x2y – 2y3

10. Factor
2x4 + 18

11. Factor each polynomial completely.
1. x3 + 4x2 + 3x x2 + 16x – 48
4(x + 6)(x – 2)
(x + 4)(x2 + 3)
3. 18x2 – 3x – 3
4. 18x2 – 50y2
3(3x + 1)(2x – 1)
2(3x + 5y)(3x – 5y)
5. 5x – 20x3 + 7 – 28x2
(1 + 2x)(1 – 2x)(5x + 7)