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Math Help - Equation

  1. #1
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    Equation

    If

    find m^3+n^3
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  2. #2
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    Re: Equation

    Quote Originally Posted by Mhmh96 View Post
    If
    find m^3+n^3
    Let n=m
    SQRT[11 + SQRT(120)] = 2SQRT(m)
    11 + 2SQRT(30) = 4m
    m = [11 + 2SQRT(30)] / 4

    Wrap it up!
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  3. #3
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    Re: Equation

    If m and n are arbitrary real numbers, then m^3+n^3 is not a function of \sqrt{m}+\sqrt{n}.

    For example, if m = 11+\sqrt{120}=21.95 and n = 0, then m^3+n^3=10582.00, but if m = 4.95 and n = 6.05, then m^3+n^3=343.07.
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