Question: What is the value of x in the equation x^2 - 9 = 0?

Options:

1. x = 3
2. x = -3
3. x = 0
4. x = ±3

Correct Answer: x = ±3

Solution:

Step 1: Factor the equation: (x - 3)(x + 3) = 0. Step 2: Set each factor to zero: x - 3 = 0 or x + 3 = 0. Step 3: Solutions are x = 3 and x = -3.