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。
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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)