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Math Help - Quadratic Equation

  1. #1
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    Quadratic Equation

    Hi,

    How to find the equation if one root of a quadratic equation is 1 + 3i.

    Pls help!

    Regards,
    Suganya
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  2. #2
    Senior Member tukeywilliams's Avatar
    Joined
    Mar 2007
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    307
    Then the other root is  1-3i .

    So  (x-(1+3i))(x-(1-3i)) = 0  or  x^2 - 2x + 10 = 0 .
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