need help please!!!!!

9x^-2 y^-1

I'm not exactly sure what you want to do but i'm assuming you want your exponents positive? just put the varibles with the negative exponents in the numerator. whenever you have a negative exponent that you want to make positive, just change it to the other side of the fraction it was orginally on. example:

1/x^(-2) = x^2
y^(-4) = 1/y^(-4)

the nine will stay where it is.

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