SOLUTION: multiply. write the answer in the form a+bi: (2+i)^2 show work

Algebra ->  Square-cubic-other-roots -> SOLUTION: multiply. write the answer in the form a+bi: (2+i)^2 show work      Log On


   

Question 35615: multiply. write the answer in the form a+bi:
(2+i)^2
show work
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
%282%2Bi%29%5E2
%282%2Bi%29%2A%282%2Bi%29+
4+%2B+4i+%2B+i%5E2

Remember that i%5E2=-1
4%2B+4i+-1
3%2B4i

R^2 at SCC