Algebra Examples

$\sqrt{\frac{y^{4}}{81}}$

Step 1

Rewrite $y^{4}$ as ${(y^{2})}^{2}$ .

$\sqrt{\frac{{(y^{2})}^{2}}{81}}$

Step 2

Rewrite $81$ as $9^{2}$ .

$\sqrt{\frac{{(y^{2})}^{2}}{9^{2}}}$

Step 3

Rewrite $\frac{{(y^{2})}^{2}}{9^{2}}$ as ${(\frac{y^{2}}{9})}^{2}$ .

$\sqrt{{(\frac{y^{2}}{9})}^{2}}$

Step 4

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

$\frac{y^{2}}{9}$