Respuesta :

We have the following relation

Therefore, we have

[tex]\begin{gathered} n^2=15\cdot5 \\ \\ n^2=3\cdot5\cdot5 \\ \\ n^2=3\cdot5^2 \\ \\ \sqrt[]{n^2}=\sqrt[]{3\cdot5^2} \\ \\ n=5\, \sqrt[]{3} \end{gathered}[/tex]

The number in [?} is 3

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