x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
(x+3y-4)(2x-y)
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
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)
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
4x(y-x)-y^2因式分解
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)+【-
x+2y+4y^2/x-y+4x^y/4y^2-x^2
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2