For what value of x is the expression
x – 5x2 – 2x – 3
not defined?
- 3, 1
- -1, -3
-
-1, 3
- 3, -2
- 1, -3
The correct answer is: C
Explanation
x2 - 2x - 3 = 0x2 - 3x + x - 3 = 0
x(x - 3) + (x - 3) = 0
(x + 1)(x - 3) = 0
x = -1 or 3