92 means that you have to multiply 9 times itself. The aswer would be 81.
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The value of -3 to the second power is 9.
The question as stated could mean either (9/2)2 or 9/22. The first is 81/4 in lowest terms, while the second is 9/4 in lowest terms.
9
92 = 9*9 = 81.
-32 = -(32) = -9 (-3)2 = 9 The difference is 9 - (-9) = 18.