Incorrect. Separate the radicands into factors with perfect squares or perfect cubes, depending on the index of the radical. Separate the factors into individual radicals. Simplify, remembering that $\displaystyle\sqrt{{{{x}}^{{2}}}}={\left|{x}\right|}\usepackage{cmbright}\Huge\$ and $\displaystyle{\sqrt[{{3}}]{{{{x}}^{{3}}}}}={x}\usepackage{cmbright}\Huge\$ .