Algebra Examples

$f (12) = \sqrt{12 - 3}$

Step 1

Subtract $3$ from $12$ .

$f (12) = \sqrt{9}$

Step 2

Rewrite $9$ as $3^{2}$ .

$f (12) = \sqrt{3^{2}}$

Step 3

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

$f (12) = 3$