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Math Help - Subtracting Algerbra Fractions

  1. #1
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    Subtracting Algerbra Fractions

    Hi

    I am having trouble with simplifying this:
    1/x+2 - 1/x+4

    I get the following:

    2/x^2+6x+8

    It just does not seem right can anyone see where I might be going wrong ?

    Thanks
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  2. #2
    MHF Contributor
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    Please use brackets where they're necessary or learn some LaTeX, otherwise it can't be read.

    I assume you mean \displaystyle \frac{1}{x + 2} - \frac{1}{x + 4}

    \displaystyle = \frac{x + 4}{(x+2)(x+4)}-\frac{x+2}{(x+2)(x+4)}

    \displaystyle = \frac{x+4 - (x+2)}{(x+2)(x+4)}

    \displaystyle = \frac{2}{(x+2)(x+4)}

    \displaystyle = \frac{2}{x^2 + 6x + 8}.


    So your answer is correct.
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  3. #3
    Master Of Puppets
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    Try \displaystyle\frac{1}{x+2}\times \frac{x+4}{x+4}- \frac{1}{x+4}\times \frac{x+2}{x+2}

    Too late, haydos beat me to it.
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  4. #4
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    Thanks for checking my answer, I will go and learn how to use latex.
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  5. #5
    Super Member TheChaz's Avatar
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    Quote Originally Posted by maca404 View Post
    Thanks for checking my answer, I will go and learn how to use latex.
    Rather that reading about LaTex, I suggest using this resource:
    Online LaTeX Equation Editor
    in which you can instantly see what your output will be, and then copy/paste into MHF.
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