Pre-Algebra Examples

$\sqrt[3]{a^{9} b^{21}}$

Step 1

Rewrite $a^{9} b^{21}$ as ${(a^{3} b^{7})}^{3}$ .

$\sqrt[3]{{(a^{3} b^{7})}^{3}}$

Step 2

Pull terms out from under the radical, assuming real numbers.

$a^{3} b^{7}$