y(x+y)+(x-y)^2-x^2-2y^2 化简
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
1、x(x-y)(x+y)-x(x+y)^2
化简:(2x-y)²-4(x-y)(x+y)
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
(1)(x^2/x)-y-x-y
【(x-y)^2+(x+y)(x-y)】除以 2x
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
【x-3y][x+y]-[x-2y][x +2y]-[x-y
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(x-2z+y)(y+z-2x)+(x
有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【-