Precalculus Examples

$f (- 6)$ if $f (x) = 4 x + 7$

Step 1

Replace the variable $x$ with $- 6$ in the expression.

$f (- 6) = 4 (- 6) + 7$

Step 2

Simplify $4 (- 6) + 7$ .

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Step 2.1

Remove parentheses.

$4 (- 6) + 7$

Step 2.2

Multiply $4$ by $- 6$ .

$- 24 + 7$

Step 2.3

Add $- 24$ and $7$ .

$- 17$