9
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Negative 81 is -81 which is minus 81. A "debt" 0f 81 divided by 9 is still a debt. So -9.
9
-9 squared = 81(-9)^2 = (-9) * (-9) = 81
Well, honey, if you're looking for a number that, when divided by 9, equals 9, you're looking for 81. 81 divided by 9 gives you 9. So, there you have it, math wizard!
Because 9 times 9 equals 81.
81