SOLUTION: i'm having a hard time with this question simplify (y^x times y^-x)^4

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Question 677830: i'm having a hard time with this question
simplify (y^x times y^-x)^4
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
simplify (y^x times y^-x)^4
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Multiply --> add exponents.
y%5Ex%2Ay%5E%28-x%29+=+y%5E%28x-x%29+=+y%5E0+=+1