Answer
$-4x\sqrt[3]{x^2}$.
Work Step by Step
The given expression is
$=\sqrt[3]{-64x^5}$
Factor as cube terms.
$=\sqrt[3]{-64x^3\cdot x^2}$
Use product property of cube roots.
$=\sqrt[3]{-64}\cdot \sqrt[3]{x^3}\cdot \sqrt[3]{x^2}$
Use $-64=(-4)^3$.
$=\sqrt[3]{(-4)^3}\cdot \sqrt[3]{x^3}\cdot \sqrt[3]{x^2}$
Simplify.
$=-4x\sqrt[3]{x^2}$.
