14：CDBDD,DDB 1/4,1/2 -3X 4 -8 104 2.5 ,0.5 2 3Y 6a 3 -8ab 5b^2 x^2-2x^2y^2 y^4 (x-m)^2(x-n)(x-m-1) -b(y-x
七年级数学高分直通车
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14：CDBDD,DDB 1/4,1/2 -3X 4 -8 104 2.5 ,0.5 2 3Y 6a 3 -8ab 5b^2 x^2-2x^2y^2 y^4 (x-m)^2(x-n)(x-m-1) -b(y-x