Question

How do you multiply `(3+2i)^2`?

Answer 1

You remember that `i^2=-1`

Explanation:

`(3+2i)^2=(3+2i)(3+2i)`

`9+6i+6i+4i^2`

`9+12i+4(-1)`

`9+12i-4=5+12i`

What would `(3+2i)(3-2i)=??`