SOLUTION: I'm really confused about how you get the square of a complex number, could you please explain?

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Question 279798: I'm really confused about how you get the square of a complex number, could you please explain?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
You didn't give an example, so use
%28a+%2B+bi%29%5E2
= a%5E2+%2B+2abi+-+b%5E2
= a%5E2-b%5E2+%2B+2abi
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%283+%2B+4i%29%5E2
= 9+-+16+%2B+24i
= -7 + 24i