SOLUTION: (3+7i)(5-2i)= explain this equation please

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Question 583593: (3+7i)(5-2i)=
explain this equation please
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
i=sqrt%28-1%29
%283%2B7i%29%285-2i%29
foil
15%2B35i-6i-14i%5E2
i%5E2=-1
15%2B29i%2B14
29%2B29i
or
29%28i%2B1%29
now if i is not intended as the imagenary number then i=a or i=x and it would drastically change this answer