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

Options:

1. x^2 - 4
2. x^2 + 4
3. 2x
4. x^2 + 2

Correct Answer: x^2 - 4

Solution:

Step 1: Recognize this as a difference of squares: (a + b)(a - b) = a^2 - b^2. Step 2: Here, a = x and b = 2. Result is x^2 - 4.