Question

Geena decided to solve the quadratic x2 + 6x = 8. Which of the following steps is where Geena made her first mistake? x2 + 6x = 8 Step 1: x2 + 6x + 8 = 0 Step 2: (x + 4)(x + 2) = 8 Step 3: x = -4 and x = -2

Answer 1

Step 2: (x + 4)(x + 2) = 8

Explanation:

x2 + 6x + 8 = 0

x2 + 4x + 2x + 8 = 0

x(x + 4) + 2(x + 4) = 0

(x + 2)(x + 4) = 0