SOLUTION: (3+i)^3 supposes to write the expression in standard a+bi form, please help, thanks, susan

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Question 785337: (3+i)^3 supposes to write the expression in standard a+bi form, please help, thanks, susan
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Use of binomial theorem might be easiest, instead of performing each multiplication step between binomials.

%283%2Bi%29%5E3=3%5E3%2B3%2A3%5E2%2Ai%2B3%2A3%2Ai%5E2%2Bi%5E3
3%5E3%2B27i-9%2B%28-i%29
27%2B26i-9
highlight%2818%2B26i%29