# How do you simplify sqrt(7/81)?

Jul 18, 2015

=color(blue)(sqrt7/9
$\sqrt{\frac{7}{81}} = \frac{\sqrt{7}}{\sqrt{81}}$
we know that $\sqrt{81} = 9$
$\frac{\sqrt{7}}{\sqrt{81}} = \frac{\sqrt{7}}{9}$