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

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Presentation transcript:

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

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)

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)

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

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

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

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

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

Example Factor x2 + 9x + 18

Example Factor x2 - 4x + 4

Example Factor 3x2 +3x -18

Example Factor x2 + 7x + 21