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Math Help - Minimum of n?

  1. #1
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    Minimum of n?

    Minimum of n ?
    x,y and n are positive integers, find minimum of n, such that
    123456789*x*x - 987654321*y*y =n
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  2. #2
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    Re: Minimum of n?

    Since 123456789 and 987654321 have greatest common factor 9, any such n must be a multiple of 9.
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