Precalculus Examples

Given $f (x) = 6 (1 - x)$ ; what is the value of $f (- 8)$ ?

Step 1

Replace the variable $x$ with $- 8$ in the expression.

$f (- 8) = 6 (1 - (- 8))$

Step 2

Simplify $6 (1 - (- 8))$ .

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Step 2.1

Remove parentheses.

$6 (1 - (- 8))$

Step 2.2

Multiply $- 1$ by $- 8$ .

$6 (1 + 8)$

Step 2.3

Add $1$ and $8$ .

$6 \cdot 9$

Step 2.4

Multiply $6$ by $9$ .

$54$