Answer
$4\sqrt7$
Work Step by Step
$\frac{28}{\sqrt{7}}$
Rationalize the denominator,
$\frac{28}{\sqrt{7}}\times\frac{\sqrt{7}}{\sqrt{7}}$
Simplify.
$\frac{28\sqrt{7}}{7}$
Reduce. Divide the numerator and denominator by greatest common factor of 7.
$4\sqrt7$
