Algebra Examples

$f (- 8) = \sqrt{x + 8} + 2$

Step 1

Replace the variable $x$ with $- 8$ in the expression.

$f (- 8) = \sqrt{(- 8) + 8} + 2$

Step 2

Simplify the result.

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Step 2.1

Simplify each term.

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Step 2.1.1

Add $- 8$ and $8$ .

$f (- 8) = \sqrt{0} + 2$

Step 2.1.2

Rewrite $0$ as $0^{2}$ .

$f (- 8) = \sqrt{0^{2}} + 2$

Step 2.1.3

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

$f (- 8) = 0 + 2$

Step 2.2

Add $0$ and $2$ .

$f (- 8) = 2$

Step 2.3

The final answer is $2$ .

$2$

Step 3