The answer to 2 is not 'B'; rather it is 'A'
(4-2i)(5+i)
=20+4i-10i-2i^2
=20+4i-10i-2(-1)~negatives become positive-this is where you went wrong
=20-6i+2
=22-6i or 'A'
I might do a few more but in the mean time I have my own work to do
Ok have another test coming up so Im trying to do some review questions. Here they are. There are only 7 so if you only look at one I would be so greatful. I had issues with every one of them besides the first which was a simple one. I think I got them right though based on my end result. And if not thanks in advance for clearing things up. Like I said any help would be really great.