Precalculus Examples

$f (x) = - 5 x - 3$ ; find $f (5)$

Step 1

Replace the variable $x$ with $5$ in the expression.

$f (5) = - 5 \cdot 5 - 3$

Step 2

Simplify $- 5 \cdot 5 - 3$ .

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Step 2.1

Remove parentheses.

$- 5 \cdot 5 - 3$

Step 2.2

Multiply $- 5$ by $5$ .

$- 25 - 3$

Step 2.3

Subtract $3$ from $- 25$ .

$- 28$