Finite Math Examples

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

Step 1

Replace the variable $x$ with $12$ in the expression.

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

Step 2

Simplify the result.

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Step 2.1

Subtract $3$ from $12$ .

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

Step 2.2

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

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

Step 2.3

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

$f (12) = 3$

Step 2.4

The final answer is $3$ .

$3$

Step 3