Question

radacina patrata a numarului rational $\frac{4}{81}$

Answer 1

$\sqrt{ \frac{4}{81} } = \sqrt{( \frac{2}{9} } ) ^{2} = \sqrt{ \frac{2}{9} }$

Answer 2

$\sqrt{ \frac{4}{81} } = \frac{2}{9}$