Question

$\frac{2}{4} \sqrt{81 x^{3}y ^{7} }$

Answer 1

$\frac{2}{4} \sqrt{81 x^{3} y^{7} } = \frac{9xy^{3} \sqrt{xy} }{2}$

Answer 2

usando leyes de exponentes
$\frac{2}{4} \sqrt{ 81x^{3} y^{7}} = \frac{1}{2} \sqrt{ 9^{2} x^{2}x y^{6}y}$
$\frac{2}{4} \sqrt{ 81x^{3} y^{7}} = \frac{9}{2}x y^{3} \sqrt{xy}$