Answer
The steps are shown.
Work Step by Step
Let the rational expressions be:
$\frac{a^2}{b^2}$ and $\frac{b^3}{a^3}$
Their product is
$=\frac{a^2}{b^2} \times \frac{b^3}{a^3}$
Divide out common factors.
$= \frac{b}{a}$.
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