algebra

in equation x - 1/x
________
x + 1/x My answer key said the answer was x squared -1
_____________
squared + 1
I'm wandering why it wouldn't simply be
x-1
______
x+1

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  1. i meant my answer was x squared - 1
    ______________
    x squared +1

    original equation x-1/x
    ________
    x+1/x

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  2. equation? Where is the equal sign? I have no idea what you need to do.

  3. As Bob noted you don't have an equation.

    you probably have the expression

    (x - 1/x)/(1 + 1/x)
    and are asked to simplify it.

    Hint: how about multiplying the fraction by x/x

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    posted by Reiny
  4. yes the directions are to simplify

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  5. (x^2-1)
    -------
    (x+1)

    (x+1)(x-1)
    -----------
    (x+1)

    = x-1

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    posted by Damon

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