X-9y/6xy^2-x+3y/9x^2ykk

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， (X-9y)/(6xy^2-(x+3y)/(9x^2y) 2x-3y/xy×2x^2y^2/6x-9y 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 9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解 4x-y/2根号x+根号y 9x-6根号xy+y/3根号x-根号y (9x^2y-6xy^2)/3xy 2x方-3x-6xy+9y 计算：1.（x-1)^2+2(1-x) 2.(x-y)/(x+3y)÷(x^2-y^2)/(x^2+6xy+9y^2)-2y/(x+y）1.（x-1)^2+2(1-x)2.(x-y)/(x+3y)÷(x^2-y^2)/(x^2+6xy+9y^2)-2y/(x+y） 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 3/x —2/y=3 (2x-3y-xy) / (7xy+9y-6x)= 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(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