Question #N334
The expression $(x + 2)^2$ is equivalent to which of the following?
A. x^2 + 4
B. x^2 + 2x + 4
C. x^2 + 4x + 4
D. x^2 + 4x + 2
Correct Answer is: C
The expression $(x + 2)^2$ is a perfect square trinomial. We can use the pattern (a + b)^2 = a^2 + 2ab + b^2 to expand it: (x + 2)^2 = x^2 + 2(x)(2) + 2^2 = x^2 + 4x + 4.