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Math Help - Calculate and solve

  1. #1
    Super Member dhiab's Avatar
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    Calculate and solve

    Calculate :
    Deduct,in C , the resolutions of this equation :
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  2. #2
    MHF Contributor Amer's Avatar
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    Quote Originally Posted by dhiab View Post
    Calculate :
    Deduct,in C , the resolutions of this equation :
    ok


    \left((3-2i)(3-2i)\right)^2=\left((9-6i-6i-4)\right)^2=(5-12i)^2

    you can continue it

    the second one

    z^4=4(119+120i).....z=\left(\sqrt{(4(119))^2+(4(12  0))^2}e^{i(arctan(\frac{120}{119}+2n\pi)}\right)^{  \frac{1}{4}}

    z=\left((4(13))^{\frac{1}{4}}e^{\dfrac{i(arctan(\d  frac{120}{119})}{4}+\dfrac{n\pi}{2}}\right)

    take n=1,2,3,4 sub first 1 then 2 then 3 then 4
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  3. #3
    Super Member dhiab's Avatar
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    hELLO


    =25-120i-144
    =-119-120i
    =-(119+120i)
    Rmark : i2 = -1
    You by cotinu the second question THANK YOU


    4
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  4. #4
    MHF Contributor Amer's Avatar
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    You know the answer why you ask then ???
    Last edited by Amer; June 5th 2009 at 08:13 AM.
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  5. #5
    Super Member dhiab's Avatar
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    hello : -(119+120i) = i2(3-2i)4
    you have -(119+120i) , no 119+120i

    i2(3-2i)4 = ( ........ ...... ) 4
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  6. #6
    MHF Contributor Amer's Avatar
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    Cooool

    atna bt3rf al jwab

    Thanks
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