x+2y=592x+y=36

x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 x+2y=592x+y=36 3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 填空：x-y/x+y=( )/x^2-y^2 （x-y)2•(y-x)³(x-y)=? y+y'-2y=2x 若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y＝ 微分方程y - 2y' + y = x (x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 化简 x / y(x+y) - y / x(x+y) = (x-4y)(2x+y)= (x+y)(2x-3y)=? x+y>=2,x-y x+y>=2,x-y y'-2y=(e^x)-x y'+2y/x=x通解