Answer
$\dfrac{4}{9}$
Work Step by Step
Need to solve $12(-x)^3$
Plug the value of $x=-\dfrac{1}{3}$ in $12(-x)^3$
$12(-x)^3=12[-(-\dfrac{1}{3})]^3$
and
$(12) \cdot (\dfrac{1}{27})=\dfrac{4}{9}$
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