Answer:
x = -1, 3.
Step-by-step explanation:
x2 - 2x = 3
Completing the square:
We use the identity: a^2 - bx = (a - b/2)^2 - (b/2)^2:
(x - 1)^2 - 1^2 = 3
(x - 1)^2 = 3 + 1
(x - 1)^2 = 4
Taking square roots of both sides
x - 1 = +/- 2
x = 2 + 1 , -2 + 1
x = -1, 3.
