Question: What is the result of (x + 4)^2?

Options:

1. x^2 + 8x + 16
2. x^2 + 16
3. x^2 + 4x + 4
4. x^2 + 4x + 16

Correct Answer: x^2 + 8x + 16

Solution:

Using the square of a binomial identity, (a + b)^2 = a^2 + 2ab + b^2, we have (x + 4)^2 = x^2 + 2(4)x + 4^2 = x^2 + 8x + 16.