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Math Help - Quadratic Formula

  1. #1
    Member ~berserk's Avatar
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    Quadratic Formula

    Solve using the quadratic formula

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  2. #2
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  3. #3
    Member ~berserk's Avatar
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    i know that but take number one for example when i get -4= +-radical(-36)/2 i don't know what to do
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  4. #4
    Member Danshader's Avatar
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    hello berserk,

    i am not sure if you have learn complex number yet but,
    \sqrt {-1} = \pm i
    and
    \sqrt {-25}= <br />
 \sqrt {-5^2} = \pm 5i<br />

    therefore say,

     x=\sqrt{-25}

    then,

    <br />
x=\pm 5i<br />
    Last edited by Danshader; April 27th 2008 at 11:39 PM.
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