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Math Help - few problems

  1. #1
    Junior Member
    Joined
    Oct 2007
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    73

    few problems

    I have a few problems I am stuck on. They include dividing fractions that include factoring first.

    1.) (w-4)^2 over 4-w^2 divided by w^2 - 16 over w-2

    2.) 2c-4 over 8 divided by 2-c over 2.

    3.) x^3 - 1 over x^4 -1 divided by 3x^2 + 3x +3 divided by x^3 + x^2 + x + 1.

    Thanks, I used the term "over" which means it's being divided by that on it's own side.
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  2. #2
    Newbie
    Joined
    Jan 2009
    Posts
    8
    For the 1st question, I assume its like this
    \frac{\frac{(w-4)^2}{2^2-w^2}}{\frac{w^2-4^2}{w-2}}<br />
=\frac{\frac{(w-4)^2}{(2-w)(2+w)}}{\frac{(w-4)(w+4)}{w-2}}<br />
=\frac{(w-4)^2(w-2)}{(2-w)(2+w)(w-4)(w+4)}<br />
=\frac{-(w-4)}{(2+w)(w+4)}<br />

    For the second question,
    \frac{\frac{2c-4}{8}}{\frac{2-c}{2}}<br />
=\frac{2(c-2)}{4(2-c)}<br />
=\frac{c-2}{-2(c-2)}<br />
=\frac{-1}{2}
    Last edited by elitewarr; January 28th 2009 at 03:13 AM.
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