(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)

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(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)
(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)

(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)
(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/(a-b)
=xy(a-b)
[(x^2+y^2)-4x^2y^2]\(x^2-y^2) 题目错误?
假如是[(x^2+y^2)²-4x^2y^2]\(x^2-y^2)
=[x^4+2x²y²+y^4-4x²y²]/(x²-y²)
=(x^4-2x²y²+y^4)/(x²-y²)
=(x²-y²)²/(x²-y²)
=x²-y²

化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 x^2-xy-6y^2+3xy+y+2 3y/x*x-y*y+x/x*x-2xy+y*y+6y*y/x*x*x-x*x*y-xy*y+y*y*y等于多少? (9x^2y-6xy^2)/3xy 求x^3 - 6x^2y + 11xy^2 - 6y^3 思路x^3 - 6x^2y + 11xy^2 - 6y^3= x^3 - 3x^2y + 2xy^2 - 3x^2y + 9xy^2 - 6y^3= (x^2 - 3xy + 2y^2)(x - 3y)= (x^2 - 2xy - xy + 2y^2)(x - 3y)(x - y)(x - 2y)(x - 3y)求思路 2x-3y/xy×2x^2y^2/6x-9y (X-9y)/(6xy^2-(x+3y)/(9x^2y) 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) 9x^2y+y^3-6xy^2因式分解 因式分解6xy^2-9x^2y-y^3 6xy^2-9x^2y-y^3因式分解 x^2y-6xy^2+9y^3 6xy-9x^2y-y^3 因式分解 (x^2y-9y)/(xy+3y) 2x^2+3xy+y^2+x-y-6