Respuesta :

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

We can find this by writing:

[tex]\sqrt[]{x}=9[/tex]

where x is the number within the square root.

Then, we can solve as:

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

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

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