Answer: x = ±3
Explanation:
To solve the quadratic equation x^2 - 9 = 0, we can use the square root property of equality.
Adding 9 to both sides of the equation, we get:
x^2 = 9
Taking the square root of both sides, we get:
x = ±√9
Simplifying the square root of 9, we get:
x = ±3
Therefore, the solution set for the quadratic equation x^2 - 9 = 0 is {3, -3}.