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Thread: Help with complex numbers?

  1. November 7th 2012, 04:00 PM #1
    Benja303
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    Help with complex numbers?

    question 5 in the attached pdf..


    Please explain.. I know you get to a point where it is the sq root of -11 but idk what to do after this . Please help
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  2. November 7th 2012, 04:21 PM #2
    Prove It
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    Re: Help with complex numbers?

    \displaystyle \begin{align*} \sqrt{-11} = \sqrt{-1 \cdot 11} = \sqrt{-1} \cdot \sqrt{11} = i\sqrt{11} \end{align*}
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  3. November 8th 2012, 05:32 AM #3
    topsquark
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    Re: Help with complex numbers?

    Not a graded assignment.

    -Dan
    Last edited by topsquark; November 8th 2012 at 09:00 AM.
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