## Algebra: A Combined Approach (4th Edition)

$\sqrt{9x^{5}y^{7}}=3x^{2}y^{3}\sqrt{xy}$
$\sqrt{9x^{5}y^{7}}$ Take the square root of each factor and then simplify: $\sqrt{9x^{5}y^{7}}=\sqrt{9}\cdot\sqrt{x^{5}}\cdot\sqrt{y^{7}}=...$ $...=(3)(x^{2}\sqrt{x})(y^{3}\sqrt{y})=3x^{2}y^{3}\sqrt{xy}$