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Which of the following is a polynomial with roots 4, –2i, and 2i ?

Which of the following is a polynomial with roots 4, –2i, and 2i ?
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3 votes
Which of the following is a polynomial with roots 4, –2i, and 2i ?

User First Zero
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1 Answer

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(x - 4)(x + 2i)(x - 2i) = 0
x(x^2 + 4) - 4(x^2 + 4) = 0
x^3 + 4x - 4x^2 - 16 = 0
x^3 - 4x^2 + 4x - 16 = 0
User Wei Lin
by
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