x^2+y-xy-x x^3-x^2-x+1 x^2-2x-y^2+1 （x^2+3x）^2-（2x+2)^2 这四个多项式中不含因式（x-1)的是哪个?要求要每个多项式的分解过程是这四个多项式x^2+y-xy-x....x^3-x^2-x+1......x^2-2x-y^2+1......(x^2+3x)^2-(2x+2)^2

计算：1-2x+x^2/x-x^3*xy+x^2y/x-x^2 (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， -xy^2(x+y)^3+x(x+y)^2因式分解 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) (x+3y)/(x^2+xy)-x+y计算题 [x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y [x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y [x(x^2y^2-xy)-y(x^2-x^3y)]/(2x^2y) (x+y)/x /(x-(2xy-y^2)/x) 因式分解 （x^2+xy/x-y)/（xy/x-y)计算 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 (x^3-2x^2+xy^2)/(x-y)+(x+y)(y-x)=? x^3-2x^2y+xy^2-x因式分解 (x^2-x-3)(x^2-x-5)-3x^3-2x^2y+xy^2-x 因式分解(xy-x^2)^3-x^3（y-x） (-x-y)(x^2+xy+y^2) 化简x^-y^/x^-2xy+y^ 2*(x-y)²(y-x)(xy) x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²