Answer
$-2x^5+2x^3$
Work Step by Step
Using $a(b+c)=ab+ac$ or the Distributive Property, the given expression, $
-2x^3(x^2-1)
$, is equivalent to
\begin{array}{l}\require{cancel}
-2x^3(x^2)-2x^3(-1)
\\\\=
-2x^5+2x^3
.\end{array}
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