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OpenStudy (anonymous):
Evaluate 9x^2y^-2 for x = –3 and y = 2.
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OpenStudy (anonymous):
81/4
OpenStudy (anonymous):
9 (-3)^2 / y^2
OpenStudy (anonymous):
so 9 (-3)^2/ (2)^2
OpenStudy (anonymous):
9 (9) / (4)
OpenStudy (anonymous):
81/4
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