(3x^2+2y-2y^2)·(-xy)^3要过程

X^Y-2XY^2+y^3 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) x^2-xy-6y^2+3xy+y+2 2x²y-3(2xy-xy)-xy (x+y)(x-y)-(2xy+3y)平方平方是(2xy+3y)的 x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________? (-x-y)(x^2+xy+y^2) 化简x^-y^/x^-2xy+y^ 2*(x-y)²(y-x)(xy) 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 (x^2y-9y)/(xy+3y) （x^2+xy/x-y)/（xy/x-y)计算 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 若1/x-1/y=2,求3x-2xy-3y/x-xy-y的值3x-2xy-3y/x-xy-y 不好意思，是3x-2xy-3y/x-2xy-y -xy^2(x+y)^3+x(x+y)^2因式分解 (xy^2-2xy+x)*y^3-y分之y^3+y^2