Question 775735
This is a simple case of foiling, but you have to remember that i^2 = -1.

(16-5i)(-2-i)

first :  -32

outer: -16i

inner: 10i

last: 5i^2

-32 + -16i + 10i + 5i^2

-32 - 16i + 10i - 5

-6i - 37