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Math Help - Simple Complex number

  1. #1
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    Simple Complex number

    how to solve sqrt(-8.3)sqrt(1 - i8)?


    i try to solve it.. but got the wrong answer..

    sqrt(-8.3)sqrt(1 - i8) = sqrt[(8.3i^2)(1 - 8i)]
    = sqrt (8.3i^2 - 66.4i)
    = 2.88i + 8.15

    the answer should be.. 5.41 + i6.13
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  2. #2
    Grand Panjandrum
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    Re: Simple Complex number

    Quote Originally Posted by nameck View Post
    how to solve sqrt(-8.3)sqrt(1 - i8)?


    i try to solve it.. but got the wrong answer..

    sqrt(-8.3)sqrt(1 - i8) = sqrt[(8.3i^2)(1 - 8i)]
    = sqrt (8.3i^2 - 66.4i)
    OK up to here

    = 2.88i + 8.15
    where did this come from?

    CB
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  3. #3
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    Re: Simple Complex number

    sorry... typo... from my calculation.. it should be 2.88i - 66.4
    i get it from sqrt (8.3i^2) and sqrt 66.4i)
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