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  1. Could you please post the entire questions of these two problems? You may use English! 2007-09-17 17:06:06 補充: 1)2p^2-5(2-p)-p(2+p) =2p^2-10+5p-2p-p^2 =p^2+3p-10 =(p-2)(p+5) 2)2/x+y + 2y/x^2+y^2 =2x/x^2+2y/x^2+y+y^2 =2(x+y)/x^2+(x^2y+x^2y^2)/x^2 =((xy)^2+x^2y+2x+2y)/x^2...

    分類:科學 > 數學 2007年09月18日