Answer
$\sqrt[4]{x^{5}}$.
Work Step by Step
The given expression is
$=(x^{\frac{3}{4}})(x^{\frac{1}{2}})$
Add exponents of powers with the same base.
$=x^{\frac{3}{4}+\frac{1}{2}}$
Simplify.
$=x^{\frac{3}{4}+\frac{2}{4}}$
$=x^{\frac{3+2}{4}}$
$=x^{\frac{5}{4}}$
Write in radical form.
$=\sqrt[4]{x^{5}}$.