For what value of x is the expression
x – 5x^{2} – 2x – 3
not defined?

A.
3, 1 
B.
1, 3 
C.
1, 3 
D.
3, 2 
E.
1, 3
Correct Answer: Option C
Explanation
x^{2} – 2x – 3 = 0
x^{2} – 3x + x – 3 = 0
x(x – 3) + (x – 3) = 0
(x + 1)(x – 3) = 0
x = 1 or 3