Question 100148
(xy^5 / x^-4y^2)^-2
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Comment: The negative sign means "invert"; the 2 means "square"
1st: Invert to get:
(x^-4y^2/xy^5)^2

2nd: Square to get:
(x^-8 y^4 / x^2 y^10)

3rd: Simplify:
(y^4 / x^10 y^10)

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Cheers,
Stan H.