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  1. 01-25-2012, 07:47 PM Top | #1
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     4x2+9y2=45
    x2-4y2=5


  2. 01-25-2012, 08:14 PM Top | #2
    Oct 2011
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     4x2+9y2=45
    x2-4y2=5
    俿
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  3. 01-26-2012, 08:50 AM Top | #3
    ( )
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  4. 01-26-2012, 10:01 AM Top | #4
    Oct 2011
    541
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    3,046
    Thanked: 2932
    [quote= ( );13018] [/quote


    ( )
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