SOLUTION: Find the cubic equation that has -1 and 2i as roots.

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Question 975735: Find the cubic equation that has -1 and 2i as roots.
Answer by Alan3354(69443) About Me  (Show Source):
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Find the cubic equation that has -1 and 2i as roots.
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Complex roots occur in pairs.
--> -1, 2i & -2i
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(x+1)*(x-2i)*(x+2i) = 0