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2 votes
which of following is equal to 9
√(64)
√(100)
√(121)
√(81)

User Cloy
by
7.5k points

1 Answer

4 votes

We have 4 expressions of square roots and we want to know which one is equal to 9.

We can find this by writing:


\sqrt[]{x}=9

where x is the number within the square root.

Then, we can solve as:


\begin{gathered} \sqrt[]{x}=9 \\ (\sqrt[]{x})^2=9^2 \\ x=81 \end{gathered}

Answer: the square root of 81 is equal to 9.

User Arwen
by
6.2k points
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