SOLUTION: Simplify by factoring: square root x^18 I think the answer is x^9 but I am only half sure! THANKS!!

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Question 377947: Simplify by factoring: square root x^18
I think the answer is x^9 but I am only half sure!
THANKS!!
Answer by jsmallt9(3758) About Me  (Show Source):
You can put this solution on YOUR website!
You are very close. The only problem is that square roots are supposed to be positive (or zero). x%5E9 could be negative if x is negative. And we have no reason to say that x cannot be negative. So we have to do something to ensure that our answer is positive (or zero).

Absolute value comes to the rescue:
sqrt%28x%5E18%29+=+abs%28x%5E9%29