Algebra Examples

$\sqrt{25 y^{2} - 9 y^{2}}$

Step 1

Subtract $9 y^{2}$ from $25 y^{2}$ .

$\sqrt{16 y^{2}}$

Step 2

Rewrite $16 y^{2}$ as ${(4 y)}^{2}$ .

$\sqrt{{(4 y)}^{2}}$

Step 3

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

$4 y$