Answer
2
Work Step by Step
If $b\gt0$ and $b\ne1$, then $y=log_{b}x$ means $x=b^{y}$ for every $x\gt0$ and every real number $y$.
Therefore, $log_{5}5^{2}=2$. We know this, because $(5)^{2}=5^{2}=25$.
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