(6x^2y+9xy^2)\(3y+2x)计算
(6x^2y+9xy^2)\(3y+2x)
（4mn-m^2-4n^2）\（2n-m）
(a^2xy-2abxy+b^2xy)\(a-b)
[(x^2+y^2)-4x^2y^2]\(x^2-y^2)
人气：430 ℃ 时间：2020-09-01 20:55:47
解答
(6x^2y+9xy^2)\(3y+2x)=3xy(2x+3y)/(3y+x)=3xy(4mn-m^2-4n^2）\（2n-m）=-(4n²-4mn+m²)/(2n-m)=-(2n-m)²/(2n-m)=-(2n-m)=m-2n(a^2xy-2abxy+b^2xy)\(a-b)=xy(a²-2ab+b²)/(a-b)=xy(a-b)²...
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