若3x^2y-2xy^2÷A＝3x+2y,则单项式A为多少?原式＝－3x+2y,答案已经出来了是－xy。

化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) 若xy=2（x+y),求 （3x-5xy+3y)÷(-x+3xy-y) 的值 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) (3xy)^2÷(-xy)+(x-2y)^2-(x+2y)(x-2y) (3xy)平方/(-xy)+(x-2y)平方-(x+2y)(x-2y)＝ 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 x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² [(3x+y)虏-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy) 是[(3x+y)²-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy) 已知xy=-2,x-y=3,求（x+y)（x-y)-y^2+（x-y)^2-（6x^2y-2xy^2)÷2y a/x-y,b/3y-3x,c/x^2-2xy+y^2通分 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) √x+y-3+/xy+x+y-2/＝0,求x÷y+y÷x的值. [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 若1/x+1/y=2,则(2x-xy+2y)÷(3x+5xy+3y)