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OpenStudy (anonymous):
What is the principal square root of 81?
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OpenStudy (anonymous):
Thanks
OpenStudy (anonymous):
? how?
OpenStudy (anonymous):
it is 9
OpenStudy (anonymous):
were u joking?
OpenStudy (jamesj):
it is the positive number when square gives 81. So what number is that? E.g., the principle square root of 16 is 4, because 4 is positive and 4 squared is 16.
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