-(x-y)^2-2(y-x)^2-5(x-y)^2+8(x-y)^2化简
1、x(x-y)(x+y)-x(x+y)^2
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
化简:(2x-y)²-4(x-y)(x+y)
数学(x-y)^5*(y-x)^3*(x-y)^2
(1)(x^2/x)-y-x-y
化简:[(x+2y)^2-(x+y)(3x-y)-5y^2]/2x
5(x-y)^2-(x-y)-8(x-y)^2-3(x-y)
【(x-y)^2+(x+y)(x-y)】除以 2x
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
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
(X+2Y)(5X-2Y)