SOLUTION: Write without negative exponents: (3xy^2)-1 Not sure?

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Question 171536This question is from textbook
: Write without negative exponents: (3xy^2)-1
Not sure?

 This question is from textbook

Found 3 solutions by nerdybill, solver91311, Mathtut:
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
+%283xy%5E2%29%5E-1+
.
Is the same as:
+1%2F%283xy%5E2%29

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!
Apply the rule: a%5E%28-1%29=1%2Fa, so let a=3xy%5E2

Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
if I am reading this question correctly this is what you must do. If not you are going to have to rewrite it...the only way this make sense is if the -1 in the problem is and exponent.
:
%283xy%5E2%29%5E-1
:
1%2F%283xy%5E2%29this eliminates the negative exponent