Question

Simplify the following product of complex numbers.
(4 – 8i) * (-5 + 2i)

Answer 1

(4 – 8i) * (-5 + 2i)
=-5(4 – 8i) + 2i(4 – 8i)
=(-5*4)+(-5*-8i)+(2i*4)+(2i*-8i)
=-20+40i+8i-16i^2 (i^2=-1)
=-20+48i+(-16*-1)
=-20+48i+16
=-4+48i

Answer 2

gee got it 1/2 right, I will again go back and find out where i was off thanks for your help

Answer 3

yw.

Answer 4

http://openstudy.com/study#/updates/4fcc53bee4b0c6963ad768a0