SOLUTION: i need to understand how x^2=-9 is it an always, sometimes, or never?

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Question 669921: i need to understand how x^2=-9 is it an always, sometimes, or never?
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2+=+-9
...
sqrt%28x%5E2%29+=+%2B-+sqrt%28-9%29
...
x = %2B-sqrt%283%2A3%2A-1%29
...
x = +/- 3i
.....................
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