[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
1、x(x-y)(x+y)-x(x+y)^2
(1)(x^2/x)-y-x-y
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013
1.[(x-y)^2-2(y -x)]÷(x-y)
(1)(x+y)^2-(x-y)^2
1、(x-2y)(x+y)
【(x-y)^2+(x+y)(x-y)】除以 2x
因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(
1) (2x+5y)(2x-5y)(-4x^2-25y^2) 2) [(x+y)(x-y)-(x-y)^2+2y(x-y
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
(x+y)^2(x-y)^2-(x-y)(x+y)(x^2+y^2)分解因式