Evaluate f(x) = square root of 9

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

Step 1

Simplify $\sqrt{9}$ .

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

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

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

$f (x) = 3$

Step 2

Subtract $f (x)$ from both sides of the equation.

$0 = 3 - f (x)$

Step 3

Rewrite the equation as $3 - f (x) = 0$ .

$3 - f (x) = 0$