Answer
$a^{5}b^{9}$
Work Step by Step
Using laws of exponents, the given expression, $
(a^2b^7)(a^3b^2)
$, simplifies to
\begin{array}{l}\require{cancel}
a^{2+3}b^{7+2}
\\\\=
a^{5}b^{9}
.\end{array}
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