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OpenStudy (anonymous):
principal square root of 81
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OpenStudy (anonymous):
9
OpenStudy (anonymous):
i put that and it was wrong
OpenStudy (anonymous):
what???
OpenStudy (anonymous):
must be some new math
OpenStudy (anonymous):
I just looked it up on Wolfram, and it says that the PRINCIPAL square root of 81 = 9 That's weird...
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