The solution of the equation x2 - 2x = 8 is
A
x = 0 or 2
B
x = -2 or 4
C
x = 2
D
x = -4
E
x = 2 or 4
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
x2 - 2x = 8 = 8
x2 - 2x - 8 = 0
(x2 - 4x) + (2x - 8) = 0
When x + 2 = 0
x = -2, when x - 4 = 0
x = 4
-2 or 4
Source: Myschool Past Questions Archive (Record #32653)