Answer
a.) 4$^\frac{1}{5}$x$^\frac{2}{5}$
b.) (7ab)$^\frac{1}{2}$
Work Step by Step
In rational exponents, the denominator translates to the root of the base and the numerator translates to the power of the base.
a.)$\sqrt[5] {4x^2}$=4$^\frac{1}{5}$x$^\frac{2}{5}$
b.) $\sqrt {7ab}$=(7ab)$^\frac{1}{2}$
