Precalculus Examples

$f (x) = 4 x$ ; find $f (- 15)$

Step 1

Replace the variable $x$ with $- 15$ in the expression.

$f (- 15) = 4 (- 15)$

Step 2

Simplify $4 (- 15)$ .

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Step 2.1

Remove parentheses.

$4 (- 15)$

Step 2.2

Multiply $4$ by $- 15$ .

$- 60$