Evaluate Using the Given Value f(9)=2 square root of 9

$f (9) = 2 \sqrt{9}$

Step 1

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

$f (9) = 2 \sqrt{3^{2}}$

Step 2

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

$f (9) = 2 \cdot 3$

Step 3

Multiply $2$ by $3$ .

$f (9) = 6$