Home > INT2 > Chapter 6 > Lesson 6.1.4 > Problem6-45

6-45.

If $a = 2 + 3i$ and $b = 1 - i$, compute each of the following:

1. $a + b$

$(2 + 3i) + (1 - i)$
Combine like terms.

1. $a - b$

$1 + 4i$
Did you remember to distribute the negative?

1. $ab$

An area model can be used to multiply.
Remember that $i^2 = -1$.