SOLUTION: MULTIPLY AND SIMPLIFY (3+6i)(5-i)

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Question 6352: MULTIPLY AND SIMPLIFY
(3+6i)(5-i)
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
(3+6i)(5-i) becomes 15+-+3i+%2B+30i+-6i%5E2 which simplifies to 15+%2B+27i+-6i%5E2

Also, as i%5E2+=+-1, we get 15+%2B+27i+%2B6 --> 21+%2B+27i --> 3(7+9i)

jon.