1. Solving Quadratics Review

2. We must solve to get x 2 by itself 1 st !

3. Ex. 1: Solve the equation x 2 – x -20 = 0 STEP 1: Factor and set each factor equal to zero. x-5= 0 and x+4 = 0 STEP 2: Solve for x. x-5= 0 x = 5 x+4 = 0 x=-4 (x-5)(x+4)=0

4. Solving with GCF Example 2: 6x 2 + 30x + 36=0 GCF? 6 6(x 2 + 5x + 6)=0 Can be x 2 + 5x + 6 factored? x 2 + 5x + 6 can be factored to (x + 3)(x + 2) 6(x + 3)(x + 2)=0 Answers: x = -3 x = -2

5. 6x 2 – 11x + 3=0 (2x(3x– 1) = 0 – 3) x = 3/2 x = 1/3 Solve:

6. Ex: Solve x 2 + 6x +10 = 0 a = b = c = 1st1st 2 nd

7. Solve 1) x 2 + 5x + 6 = 0 2) x 2 – 2x – 8 = 0 3) x 2 + 7x + 6 = 0 4) 6x 2 + 15x = 0