若x-y=5,xy=6,求x^2-xy^2和x^2y+xy^2
若x-y=5,xy=6,求x^2-xy^2和x^2y+xy^2
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
若x+y=5,xy=6,求x^2y+xy^2的值
x-xy=40,xy-y= -20,求代数式x-y和x+y-2xy
已知:x-xy=40,xy-y=-20,求代数式x-y和x+y-2xy的值.
已知x^2-xy=5,xy-y^2=-3求3(x^2-xy)-xy+y^2
已知xy^2=-2,求-xy(x^2y^5-xy^3-y)的值.
已知xy^2=-2 求-xy(x^2y^5-xy^3-y)
若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值
若y-x/xy=3,求分式2x+3xy-2y/x-2xy-y
已知xy/x+y=3,求代数式2x-5xy+2y/x-3xy+y
已知xy/x+y=2,求代数式3x-5xy+3y/-x+2xy-y的值