SOLUTION: Please help me solve this problem. (5 + 3i)* (2 + i)

Question 27911: Please help me solve this problem.
(5 + 3i)* (2 + i)
Answer by bmauger(101) (Show Source): You can put this solution on YOUR website!
For the most part, you can treat i's just like x's (it's only when we get to i^2 that we have to do anything differently).
So we start by using FOIL to get:

The difference now comes in that i^2 term at the end. Since i is the imaginary number defined by then so whenever you see an i^2 term, replace it with a negative 1:

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