Precalculus Examples

let $f (x) = - 5 x - 4$ and $g (x) = 6 x - 7$ find $f (x) + g (x)$

Step 1

Replace the function designators in $f (x) + g (x)$ with the actual functions.

$- 5 x - 4 + 6 x - 7$

Step 2

Simplify $- 5 x - 4 + 6 x - 7$ .

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Step 2.1

Remove parentheses.

$- 5 x - 4 + 6 x - 7$

Step 2.2

Add $- 5 x$ and $6 x$ .

$x - 4 - 7$

Step 2.3

Subtract $7$ from $- 4$ .

$x - 11$