(2x^-2 y^3/6xz^5)^-4

Answer is 81x^12 z^20/y^12

how is this so?

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- Feb 1st 2010, 10:08 PMSSKSimplify: Write Answer Only Using Positive Exponents
(2x^-2 y^3/6xz^5)^-4

Answer is 81x^12 z^20/y^12

how is this so? - Feb 2nd 2010, 04:04 AMGrandad
Hello SSKFirst, invert the fraction to get rid of the negative power outside the bracket:

Simplify: