Question: What is the value of x in the equation x^2 - 16 = 0?

Options:

1. x = 4
2. x = -4
3. x = 0
4. x = ±4

Correct Answer: x = ±4

Solution:

Factor the equation: (x - 4)(x + 4) = 0. Thus, x = 4 or x = -4.