Precalculus Examples

$f (x) = - x - 2$ ; find $f (3)$

Step 1

Replace the variable $x$ with $3$ in the expression.

$f (3) = - (3) - 2$

Step 2

Simplify $- (3) - 2$ .

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Step 2.1

Remove parentheses.

$- (3) - 2$

Step 2.2

Multiply $- 1$ by $3$ .

$- 3 - 2$

Step 2.3

Subtract $2$ from $- 3$ .

$- 5$