Precalculus Examples

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

Step 1

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

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

Step 2

Simplify $5 (- 3) - 3$ .

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Step 2.1

Remove parentheses.

$5 (- 3) - 3$

Step 2.2

Multiply $5$ by $- 3$ .

$- 15 - 3$

Step 2.3

Subtract $3$ from $- 15$ .

$- 18$