Evaluate Using the Given Value f(12) = square root of 5(12)+4

$f (12) = \sqrt{5 (12) + 4}$

Step 1

Multiply $5$ by $12$ .

$f (12) = \sqrt{60 + 4}$

Step 2

Add $60$ and $4$ .

$f (12) = \sqrt{64}$

Step 3

Rewrite $64$ as $8^{2}$ .

$f (12) = \sqrt{8^{2}}$

Step 4

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

$f (12) = 8$