SOLUTION: Please help! I simplified (3+i)^2 and got 9-1 but it was wrong. thanks

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Question 619054: Please help!
I simplified (3+i)^2 and got 9-1 but it was wrong.
thanks
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
(3+i)^2
= (3+i)*(3+i)
= 9 + 6i + i^2
= 9 + 6i - 1
= 8 + 6i
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