3x^3＋6x^2y＋3xy^2

(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， （x＋2y-3xy）-（-2x-y+xy）,其中x+y=,xy=-,求值. 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) 因式分解x^4y-x^2y^3＋x^3y^2-xy^4 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 因式分解xy＋6－2x－3y 因式分解xy＋6－2x－3y 化简分式方程:x*x-xy-y*y/x*x-3x-6y+2xy