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Math Help - Rationalizing

  1. #1
    Member
    Joined
    Jul 2010
    Posts
    109

    Rationalizing

    If you rationalize the denominator of
    then you will get



    r will = 11
    s will = 4
    why won't n = 1?
    how would you find n?
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  2. #2
    Junior Member
    Joined
    Jun 2011
    Posts
    34

    Re: Rationalizing

    try to multiply upper part and lower part by 11sqrt(5)+4sqrt(3), and then use the identity: a^2-b^2 = (a+b)(a-b). n should be 557
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