(x=2y)(2x-2y)+(2x-2y)(3x=2y)-8(x²-y²)

x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 化简y(x+y)+(x+y)(x-y)-x^2 (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 因式分解x(x+y)(x-y)-x(x+y)^2 填空：x-y/x+y=( )/x^2-y^2 [(x-y)^2-(x+2y)(x-2y)]/y （x-y)2•(y-x)³(x-y)=? 计算:y-x分之x+y+x-y分之y-y-x分之2x-y y+y'-2y=2x 微分方程y - 2y' + y = x (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= (x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) x^2(x-y)+(y-x) x(x-y)2-(y-x)3 (x-4y)(2x+y)= (x+y)(2x-3y)=?