x^2(x-y)^2-4(y-x)^2帮帮忙啊~
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
求导y=(x+1)(x+2)(x+3)(x+4)的导数大神们帮帮忙
1、x(x-y)(x+y)-x(x+y)^2
(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)
2(x+y)-3(x-y) =1 6(x+y)+7(x-y)=51大神们帮帮忙
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
4x(y-x)-y^2因式分解
(x+3y-4)(2x-y)
x+2y+4y^2/x-y+4x^y/4y^2-x^2
(1)(x^2/x)-y-x-y