Question

Edna says that when (x - 2)^2 = 9, that x - 2 = 3. Use

complete sentences to explain whether Edna is correct.
Use specific details in your explanation.​

Answer 1

She is partially correct. There are 2 possible answers to this problem, and x - 2 = 3 is one of the answers. When applying the square root to both sides, the resulting answer could be either negative or positive. Therefore, applying the square root to both sides leads to the two following equations: x - 2 = 3 or x - 2 = -3.