神马作文网已知x+2y=11,x-2y=4,求分式[x/(x^2-2xy+y^2)]÷(x^2+xy+y^2）/（x^3-y^3）
![已知x+2y=11,x-2y=4,求分式[x/(x^2-2xy+y^2)]÷(x^2+xy+y^2）/（x^3-y^3）](/uploads/image/z/4171333-13-3.jpg?t=%E5%B7%B2%E7%9F%A5x%2B2y%3D11%2Cx-2y%3D4%2C%E6%B1%82%E5%88%86%E5%BC%8F%5Bx%2F%28x%5E2-2xy%2By%5E2%29%5D%C3%B7%28x%5E2%2Bxy%2By%5E2%EF%BC%89%2F%EF%BC%88x%5E3-y%5E3%EF%BC%89)
初中数学分式已知x/y=2,求（x*x-xy+3y*y）/x*x+xy+6y*y的值
已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值.
1/x-1/y=4,求分式（3x+xy-3y）/(x-2xy-y)
已知x+2y=11,x-2y=4,求分式[x/(x^2-2xy+y^2)]÷(x^2+xy+y^2）/（x^3-y^3）
已知2x-3y=0,求分式x^2+xy-y^2/2x^2+xy-y^2
已知1/x-1/y=3,求分式(2x+3xy-2y)/(x-2xy-y)
已知1/x+1/y=3,求分式3x-2xy+3y/x+xy+y的值
已知,1/x+1/y=5.,求分式3x+xy+3y/x-2xy+y的值
已知xy=-2,x-y=3,求（x+y)（x-y)-y^2+（x-y)^2-（6x^2y-2xy^2)÷2y
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
已知（x+2）^2+|x+y+5|=0,求3x^2y-[2x^2y-(2xy-x^2y)-4x^2]-xy
若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值