-2x^3y+6x^2y^2+8xy^3 因式分解

1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， 诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy) x^2-xy-6y^2+3xy+y+2 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 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? 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) 2x^2+3xy+y^2+x-y-6 x^2+xy-6y^2-3x+6y x²+3xy+2y-x+y-6因式分解 X^Y-2XY^2+y^3 3(x-y)²-7(x-y)+8(x-y)²+6(x-y)求详细过程（2） 5xy-4x²y-8xy²+3xy-xy²+4x²y 已知xy=-2,x-y=3,求（x+y)（x-y)-y^2+（x-y)^2-（6x^2y-2xy^2)÷2y (8X^3Y-6X^2Y^2-2XY^3)/(3XY) (8X^3Y-6X^2Y^2-2XY^3)/(3XY) 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)