Question #N883
The expression $(x + 2)(x - 2)$ is equivalent to which of the following?
A. x^2 - 4
B. x^2 + 4
C. x^2 - 2x + 4
D. x^2 + 2x - 4
Correct Answer is: A
This expression is a difference of squares, which follows the pattern $(a + b)(a - b) = a^2 - b^2$. In this case, $a = x$ and $b = 2$, so $(x + 2)(x - 2) = x^2 - 2^2 = x^2 - 4$.