Question

Solve x^2 + 2x = 3.

A. x = 3, –1

B. x = 3, 1

C. x = –3, 1

D. x = –3, –1

Answer 1

C

Explanation:

x^2 + 2x - 3 = 0

(x - 1)(x + 3) = 0

x - 1 = 0

x = 1

x + 3 = 0

x = -3

x = -3, 1