Solve x2 − 2x − 3 = 0
A
x = 2 or 1
B
x = 3 or -1
C
x = 1 or 0
D
x = 1 or 2
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
x2 − 2x − 3 = 0
−3x + x = − 2x
− 3x × x = − 3x2
(x2 − 3x)(x − 3) = 0
(x − 3)(x + 1) = 0
Either (x − 3) = 0 or (x + 1) = 0
x = 3 or − 1
Source: Myschool Past Questions Archive (Record #40702)