Answer: x = 6, x = -6
Explanation:
In order to solve this equation, I am going to take the square root of both sides:


Bear in mind, though - when we square-root both sides, we always obtain two solutions that are opposites of each other. Such was the case here - we got two solutions - 6 and -6 - that were opposites of each other.
Therefore, the values that make this equation true are 6 and -6.