3x^2-2xy-y^2+x+3y-2的因式分解/?

(x+y)(x-y)-(2xy+3y)平方平方是(2xy+3y)的 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) 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 X^Y-2XY^2+y^3 (-3分之1xy)的平方×[xy(2x-y)-2x(xy-y的平方)] x-y/x+y=-1/2,x*x-xy-2y*y/x*x-3xy+2y*y的解是多少?同上,请将过程写出, 已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理. 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(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) 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 已知y=3xy+x,求代数式2x+3xy-2y/x-2xy-y的值 若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值 已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值. 已知y=3xy+x,求代数式2x+3xy-2y/x-2xy-y的值 x-y+3xy=0 求2x+3xy-2y/x-2xy-y的值