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Thread: Rationalize the denominator

  1. December 11th 2007, 12:53 PM #1
    lovely08
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    Rationalize the denominator

    3/9- square root 7
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  2. December 11th 2007, 01:47 PM #2
    Krizalid
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    \left( {9 - \sqrt 7 } \right)\left( {9 + \sqrt 7 } \right) = 81 - 7 = 74.

    Now, why don't you multiply top & bottom by some nice expression to rationalize the desired?
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« use the square root property | Not sure how to start this »

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