1. Review Factor the trinomial 3x2 + 11x - 4
Solve the equation by factoring. 3x2 + 9x – 12 = 0

2. 10.7 Factoring Special Products

3. Special products
Difference of two squares pattern: a2-b2 = (a+b)(a-b) 9x2 – 16 =(3x+4)(3x-4)
m2 – 4 (m+2)(m-2) 4p2 – 25 (2p + 5)(2p – 5) 50 – 98x2 2(25 – 49x2) (5 + 7x)(5 – 7x)

4. Perfect Square Trinomial Patterns
a2 + 2ab + b2 = (a+b)2 Ex: x2 + 8x + 16 = (x+4)2 16y2 + 24y + 9 (4y + 3)2
a2 – 2ab + b2 = (a-b)2 Ex: x2 – 12x + 36 = (x - 6)2 3x2 – 30x (x2 – 10x + 25) 3(x – 5)2

5. Factor the expression - t
x2 – 25 x2 - 49
4x2 – 9 x2 – y2

6. Factor the expression - st
25x2 – 16 9x2 - 16
16 – x2 200x2 – 18

7. Factor the expression - t
x2 +10x + 25 x2 – 18x + 81
4x2 + 4x + 1 x2 – 2xy + y2

8. Factor the expression - st
4x2 +28x x2 – 20x + 4
20x2 + 60x x2 – 24xy + 16y2

9. Solve the equation. Use graphing calculator to check
-2x2 + 12x – 18 = 0
2x2 – 18 = 0

10. Solve the equation. Use graphing calculator to check
x2 – 18x + 81= 0
4x2 + 4x + 1

11. Wrap up Questions / Comments ic: hw
Hw: text pg. 622, #’s: 18 – 38 evens, 41, 42, 52, 56