Evaluate f(-1)+f(4)=-11

$f (- 1) + f (4) = - 11$

Step 1

Simplify each term.

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

$- 1 f + f (4) = - 11$

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

$- f + f (4) = - 11$

Move $4$ to the left of $f$ .

$- f + 4 f = - 11$

$- f + 4 f = - 11$

Step 2

Add $- f$ and $4 f$ .

$3 f = - 11$

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