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12-01-2017
Mathematics

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What is the square root of 81?

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bc00014 bc00014

12-01-2017

Let say 81=x.
The square root of x is a number*the same number=x.
In our case, -8 and 8 works. But, because this question asks just for the square root, we use the principal root which is just 9.
9 is your answer.

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