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Thread: algebra help: rationalize the numerator

  1. February 11th 2009, 03:52 PM #1
    robasc
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    algebra help: rationalize the numerator

    Ok, I am stuck on this problem. Here is what I have done so far:

    <br /> \frac{\sqrt(x)-2}{x-4}<br />

    <br /> = \frac{\sqrt(x) -2}{x-4} = \frac{\sqrt(x) + 2}{\sqrt(x)+2} =<br />

    <br /> \frac{x-2}{(x-4)(\sqrt(x)+2)}<br />

    Ok, here I do not remember the algebra to simplify this denominator.

    help?
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  2. February 11th 2009, 04:36 PM #2
    skeeter
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    the numerator in your last expression is incorrect.

    the expression should be ...

    \frac{x-4}{(x-4)(\sqrt{x}+2)}

    now simplify.
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