To rewrite the expression \(125^{2/3}\) as a product of identical factors, we can follow these steps:
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First, recognize that \(125\) can be expressed as a power. Specifically, \(125 = 5^3\).
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Now, substitute this into the expression:
\[ 125^{2/3} = (5^3)^{2/3} \]
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When raising a power to a power, we multiply the exponents:
\[ (5^3)^{2/3} = 5^{3 \cdot \frac{2}{3}} = 5^2 \]
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Finally, we simplify \(5^2\):
\[ 5^2 = 25 \]
Thus, the expression \(125^{2/3}\) simplified is:
\[ \boxed{25} \]