3x^3-6x^2 y+3xy^2

(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 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) x^2-xy-6y^2+3xy+y+2 3xy(x^2y-xy^2+xy)-xy^2(2x^2-6xy+2x)过程 （X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程 xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) x^2+xy-6y^2-3x+6y 2x^2+3xy+y^2+x-y-6 x²+3xy+2y-x+y-6因式分解 化简分式方程:x*x-xy-y*y/x*x-3x-6y+2xy 已知xy/x+y=6,求3x-2xy+3y/-x+3xy-y的值. 已知(xy)/(x+y)=6求(3x-2xy+3y)/(-x+3xy-y)的值. 已知:x/y=-2,求x^2-2xy-3y^2/x^-6xy 诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy)