Question

Complete the square to solve the following quadratic equation: x^2 + 2x - 8 = 0. (1 point)
x = 10, x = -8
x =2, x = -4
x = -2, x = 4
x =-10, x = 8

Answer 1

x^2 + 2x - 8 = 0
x^2 + 2x = 8
Add 1 to both sides: (x + 1)^2 = 9
x + 1 = ±3 → x = -1 ± 3

So x = 2 or x = -4.