Question #N212
If $x^2 - 2x - 15 = 0$, what is the value of $x$?
A. -3
B. 3
C. -5
D. 5
Correct Answer is: D
Factoring the quadratic expression, we get $(x-5)(x+3) = 0$. This means either $(x-5) = 0$ or $(x+3) = 0$. Solving for $x$ in each case, we get $x = 5$ or $x = -3$. Since the question asks for the value of $x$, the answer is 5.