Trigonometry Examples

$\sqrt{9 a^{2} + 16 a^{2}}$

Step 1

Add $9 a^{2}$ and $16 a^{2}$ .

$\sqrt{25 a^{2}}$

Step 2

Rewrite $25 a^{2}$ as ${(5 a)}^{2}$ .

$\sqrt{{(5 a)}^{2}}$

Step 3

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

$5 a$