Respuesta :

In mathematics, radical is term having a root. It can be square root or cube root.

The given radical in its simplest form is expressed as

[tex]\begin{gathered} 9^{\frac{2}{3}^{}} \\ \text{This can be written as} \\ (\sqrt[3]{9^{}})^2 \\ We\text{ can see that 9 is under the radical(cube root)} \end{gathered}[/tex]

Therefore, the correct option is 9

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