For i^2=-1, (4 + i)^2 = ?
So confused!
Thank you for anyone that helps :)
Great, Thank you very much! I've been waiting forever
I am still looking for help. :)
Any help would be greatly appreciated :)
(4 + i)^2 → 4^2 +2*4*i + i^2 → 16 + 8i -1 → 15 + 8i
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+8581 
