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Math Help - Algebra Help

  1. #1
    Newbie
    Joined
    Nov 2005
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    Serious help needed for easy questions

    well ive been give a series of questions although ive forgotton the method to solve most of them ive managed to get them done through books and the internet, there is a few i couldnt get done. id be greatful if some1 would point me in the right direction.

    a) evaluate 1-a/a-1 when a = x+y/x-y.


    b) simpilify (2/x + 5/y / 8y/x - 20x/y)

    c) i have 2 complex numbers z1 and z2, z1-z2 = 5

    z1 = x + i/2 - i
    and
    z2 = y/3 + 2i

    how would i go about finding x and y?

    thanks very much
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  2. #2
    MHF Contributor
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    Here's help for the first one...

    \frac{a-1}{1-a}=\frac{a-1}{-(a-1)}
    Last edited by MathGuru; November 17th 2005 at 10:04 AM.
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  3. #3
    Newbie
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    thanks very much for ur help
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