比较这两者大小要过程.X(X-Y)与Y(X-Y)(X≠Y)

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比较这两者大小要过程.X(X-Y)与Y(X-Y)(X≠Y)比较这两者大小要过程.X(X-Y)与Y(X-Y)(X≠Y)比较这两者大小要过程.X(X-Y)与Y(X-Y)(X≠Y)X(X-Y)-Y(X-Y)

比较这两者大小要过程.X(X-Y)与Y(X-Y)(X≠Y)
比较这两者大小要过程.X(X-Y)与Y(X-Y)(X≠Y)

比较这两者大小要过程.X(X-Y)与Y(X-Y)(X≠Y)
X(X-Y)-Y(X-Y)=x^2-2xy+y^2=(x-y)^2>0,因(X≠Y),所以X(X-Y)大于Y(X-Y)