Question 67175
All you need is two facts
1) i*i = -1
2) multiply each term in one factor by each term in 
the other factor
{{{(-2 + 3i)*(4 - 8i) = -8 + 16i + 12i - 24i^2}}}
{{{(-2 + 3i)*(4 - 8i) = -8 + 24 + 28i}}}
{{{(-2 + 3i)*(4 - 8i) = 16 + 28i}}} answer
The 2nd is done the same way
(1-6i)*(-2+2i)=