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OpenStudy (anonymous):
Which of the following is a polynomial with roots -2, -3i, and 3i ? x3 + 4x2 + 9x + 24 x3 - 4x2 + 9x - 24 x3 + 2x2 + 9x + 18 x3 - 2x2 + 9x - 18
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OpenStudy (anonymous):
the one that is what you get when you multiply \[(x+2)(x-3i)(x+3i)\] not as hard as it looks, because \[(x+3i)(x-3i)=x^2+9\] so your real job is to multiply \[(x+2)(x^2+9)\]
OpenStudy (anonymous):
Simple it is (x+2)(x+3i)(x-3i)
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