Question #N495
If $x^2 + 2x - 15 = 0$, what is the value of $x$?
A. -5 and 3
B. 5 and -3
C. -5 and -3
D. 5 and 3
Correct Answer is: A
We can factor the quadratic equation as (x + 5)(x - 3) = 0. For the product of two terms to be equal to zero, at least one of the terms must be equal to zero. Setting each term equal to zero, we get x + 5 = 0 or x - 3 = 0. Solving for x, we get x = -5 and x = 3.