Answer
$\sqrt[3]{x^2}$
Work Step by Step
RECALL:
$\sqrt[n]{a^m} = a^{\frac{m}{n}}.$
Use the rule above to obtain
$x^{\frac{6}{9}}
\\=x^{\frac{2}{3}}.$
Write the expression in radical form using the rule above to obtain
$\sqrt[3]{x^2}.$