[(2X+y)-y(y+4X)-8X]÷2x
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013
1、x(x-y)(x+y)-x(x+y)^2
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
1.[(x-y)^2-2(y -x)]÷(x-y)
(2x-y)^2-4(x-y)(x+2y)
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)
[(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x=