# How do you write the following expressions in simplified, radical form 16^ (2/3)?

I found: $4 \sqrt[3]{4}$
${x}^{\frac{a}{b}} = \sqrt[b]{{x}^{a}}$
${16}^{\frac{2}{3}} = \sqrt[3]{{16}^{2}} = \sqrt[3]{256} = \sqrt[3]{32 \cdot 8} = 2 \sqrt[3]{32} = 2 \sqrt[3]{4 \cdot 8} = 4 \sqrt[3]{4}$