Evaluate (f-g)(-1)

$(f - g) (- 1)$

Step 1

Apply the distributive property.

$f \cdot - 1 - g \cdot - 1$

Step 2

Move $- 1$ to the left of $f$ .

$- 1 \cdot f - g \cdot - 1$

Step 3

Multiply $- g \cdot - 1$ .

Multiply $- 1$ by $- 1$ .

$- 1 \cdot f + 1 g$

Multiply $g$ by $1$ .

$- 1 \cdot f + g$

$- 1 \cdot f + g$

Step 4

Rewrite $- 1 f$ as $- f$ .

$- f + g$

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