SOLUTION: Express the following as a complex number in the form a + ib: (3 - i) (5 + 12i)

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Question 36600: Express the following as a complex number in the form a + ib:
(3 - i) (5 + 12i)
Answer by tran3209(100) About Me  (Show Source):
You can put this solution on YOUR website!
(3-1) (5+12i)
15 + 36i - 5i + 12i^2
15 + 31i + 12i^2
15+ 31i + (12)(-1) <===== * replace i^2 by -1
The answer: 3+31i