Question

What value is added to both sides of the equation x2 − 4x = −2 in order to solve by completing the square?

A) 4
B) 2
C) −2
D) −4

Answer 1

x^2 - 4x = -2

x^2 - 4x + 4 = -2 + 4

(x - 2)^2 = 2

A) 4