For what value of x is the expression x - 5/x2 - 2x - 3 not defined?
A
3, 1
B
-1, -3
C
-1, 3
D
3, -2
E
1, -3
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
x2 - 2x - 3 = 0
x2 - 3x + x - 3 = 0
x(x - 3) + (x - 3) = 0
(x + 1)(x - 3) = 0
x = -1 or 3
Source: Myschool Past Questions Archive (Record #24053)