### Home > INT3 > Chapter 8 > Lesson 8.2.2 > Problem 8-81

8-81.

If

*f*(*x*) =*x*^{2}+ 7*x*– 9, calculate the values in parts (a) through (c) below. Homework Help ✎*f*(–3)*f*(*i*)*f*(–3 +*i*)

*f*(−3) = −21

*f*(*i*) = *i*^{2} + 7*i* − 9

*f*(*i*) = −10 + 7*i*

Use an area model to expand (−3 + *i*)^{2}.