CPM Homework Help : A2C Problem 9-74

If $f \left(x\right) = x^{2} + 7x − 9$ , calculate the values in parts (a) through (c) below.

$f \left(i\right)$
Hint (b):
$f\left(i\right) = i ^{2} + 7i − 9$
Answer (b):
$−10 + 7i$

$f \left(−3 + i\right)$
Hint (c):
$f\left(−3 + i\right) = \left(−3 +i\right)^{2} + 7\left(−3 + i\right) − 9$