Introductory Algebra for College Students (7th Edition)

$\sqrt5$
$\frac{5}{\sqrt{5}}$ Rationalize the denominator, $\frac{5}{\sqrt{5}}\times\frac{\sqrt{5}}{\sqrt{5}}$ Simplify. $\frac{5\sqrt{5}}{5}$ Reduce. Divide the numerator and denominator by greatest common factor of 5. $\sqrt5$