Evaluate Using the Given Value f(-5)=3(-5)^2-3*-5

$f (- 5) = 3 {(- 5)}^{2} - 3 \cdot - 5$

Step 1

Simplify each term.

Raise $- 5$ to the power of $2$ .

$f (- 5) = 3 \cdot 25 - 3 \cdot - 5$

Multiply $3$ by $25$ .

$f (- 5) = 75 - 3 \cdot - 5$

Multiply $- 3$ by $- 5$ .

$f (- 5) = 75 + 15$

Step 2

Add $75$ and $15$ .

$f (- 5) = 90$