Question

Solve: x2 + 4x − 12 = 0.

a. x = 2, x = −6
b. x = −2, x = −6
c. x = 3, x = −4
d. x = −3, x = 4

Answer 1

x^2 + 4x - 12 = 0
What factors add to give 4 and multiply to give -12? -2 and 6

(x-2)(x+6)

Answer A) x = 2 and x = -6

Answer 2

Use the quadratic formula to get A. x=2, x=-6