Remember that \(\sqrt[a]{b}\,=\,b^{\frac1a}\) .
Here's some examples:
\(\sqrt[3]8=8^{\frac13}=2 \\~\\ \sqrt[2]{25}=25^{\frac12}=5 \\~\\ \sqrt[2]{45^2}=(45^2)^{\frac12}=45^\frac22=45^1=45\)
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