SOLUTION: I need help with the following. Need to expand to have the answer have only positive exponents. I understand that x^-2 becomes 1/x^2. But get confused when the negative exponent

Question 31252This question is from textbook Algebra 1
: I need help with the following. Need to expand to have the answer have only positive exponents. I understand that x^-2 becomes 1/x^2. But get confused when the negative exponent is in the numerator of a fraction.
x^-2/y(xz/y - 1/y^-4)
Thank you.
Rebecca This question is from textbook Algebra 1

Answer by troyapplehelen(46) (Show Source): You can put this solution on YOUR website!
to Rebecca, if a negative exponent is in numerator, bring it to the denominator
and if a negative exponent is in denominator, bring it to the numerator.
in this case, (x^-2) should join its denominator and becomes (x^2)y.
(1/y^-4) is the same as y^4.
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