1. Warm-Up Find the product Factor using a GCF (x+2)(x+6) (x+7)(x-1)

2. Homework Review Factoring with a GCF WS 1. 3 2. 3a2 3. 3xy 4. 5a2b
7. 2y(1+3x)
8. 8a(x-7)
9. 12xy(3y-4x)
10. 15bc3(5b+4c3)
11. 8(8-5ab)
12. 9(9-4xy)
13. t(th+3)
14. 6(p-12)
15. 3r(27+16s)
16. c2(5c-2)
17. 2e(41e2-61f)
18. 5q(2-5q)
19. xy(y+1)

3. Homework Review 20. 15cd(1+2cd) 21. a(ab2+1) 22. 3rs(2r-s) 23. l(l-9)
25. 6z3(z-3)
26. 4p2(5-4q2)
27. 6(m4-10)
28. 7a2(a+2)
29. 4wv2(4v2+3w2)
30. 3c2d3(3c2-2d)
31. 3y(2+5y)
32. 5x2y(6x+7y)
33. ef(6e2-11)
34. 5rs2(4r2+5s)
35. 17x2y3(2x2-y2)
36. 35m2n(m+3n2)
37. 2d2e2(1-4d4e4)

4. Section 8.5 Factoring ax2+bx+c
SWBAT to factor trinomials with a=1

5. Review: Multiply (x + 5)(x + 2)+5 +2
x2 +5x+2x+10
x2+7x+10 x2 5x 2x 10
Notice: 2 and 5 add to get 7 and multiply to get 10

6. Review: Multiply (x - 3)(x + 4)-3
x2 +4x-3x-12
X2+x-12 x2 4x
-3x
-12
Notice: -4 and 3 add to get -1 and multiply to get -12

8. When can you use the Add/Multiply Method?
Do you have a trinomial?
Is a=1?

9. Steps for the Add/Multiply Method
Step 1: Factor out a GCF if possible
Step 2: Find two numbers that add to get b and multiply to get c
Step 3: Write as a product
Step 4: Check your answer

10. Example
Factor x2 + 9x + 18

11. Example
Factor x2 - 4x + 4

12. Example
Factor 3x2 +3x -18

13. Example
Factor x2 + 7x + 21