Warm Up Solutions

Evaluate using $f (x) = x^{2} - 3 x$ and $g (x) = - 2 x^{3} + 1$ .

$f (5) = {(5)}^{2} - 3 (5) f (5) = 25 - 15 f (5) = 10$

Note

Q: What property is being used to evaluate the function?

A: The substitution property

$g (- 3) = - 2 {(- 3)}^{3} + 1 g (- 3) = - 2 (- 27) + 1 g (- 3) = 55$

Note

Q: What does evaluate mean?

A: To find the value