SOLUTION: how to do these questions? (-2+3i)*(4-8i)= (1-6i)*(-2+2i)=

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: how to do these questions? (-2+3i)*(4-8i)= (1-6i)*(-2+2i)=      Log On


   

Question 67175: how to do these questions?
(-2+3i)*(4-8i)=

(1-6i)*(-2+2i)=
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
All you need is two facts
1) i*i = -1
2) multiply each term in one factor by each term in
the other factor
%28-2+%2B+3i%29%2A%284+-+8i%29+=+-8+%2B+16i+%2B+12i+-+24i%5E2
%28-2+%2B+3i%29%2A%284+-+8i%29+=+-8+%2B+24+%2B+28i
%28-2+%2B+3i%29%2A%284+-+8i%29+=+16+%2B+28i answer
The 2nd is done the same way
(1-6i)*(-2+2i)=