Question

-$\sqrt{ \frac{15}{39}$ = ?????

Answer 1

$\sqrt{ \frac{15}{39} } = \frac{ \sqrt{15} }{ \sqrt{39} } = \frac{ \sqrt{5} * \sqrt{3} }{ \sqrt{3} * \sqrt{13} }= \sqrt{ \frac{5}{13} }$