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Math Help - Remaining zeros?

  1. #1
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    Question Remaining zeros?

    Information is given about a complex polynomial f(x) whose coefficients are real numbers. Find the remaining zeros for f.
    Degree 3; zeros 1, 2 - i
    Can someone explain how to do this?
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  2. #2
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    Quote Originally Posted by sadieann View Post
    Information is given about a complex polynomial f(x) whose coefficients are real numbers. Find the remaining zeros for f.
    Degree 3; zeros 1, 2 - i
    Can someone explain how to do this?
    The other root is 2+i.
    If a polynomial with real coefficients has a complex root z then \overline z is also a root.
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  3. #3
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    IM PRISON MIKE! tanks..tanks...but how do you get the answer.
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