This is the concept of algebra, we are required to subtract the complex numbers. Thus;
(5-2i)-1(1+8i)
opening the brackets using the distributive property we get:
5-2i-1-8i
collecting the like terms we get:
5-1-2i-8i
=4-10i
the answer will therefore be:
4-10i
For the first one is D
The second one is A
The third one should be B, it makes the most sence
9/1250000
3090
20,400 2.04*10^4 is your Answer
5000
