若-x^2y=2,则-xy{x^5y^2-x^3y+2x}的值为多少
已知x/1-y/1=3,则5x+xy-5y/x+2y-y的值为
已知xy/x+y=2,则代数式3x-5y+8y/-x+3xy-y的值
若1/x-1/y=3,则2x+3xy-2y/x-xy-y的值为多少
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
已知y-x=3xy,则代数式2x-14xy-2y分之x-2xy-y的值为多少?
若x/3y=y/(2x-5)=(6x-15y)/x,则(4x^2-5xy+6y^2)/(x^2-2xy+3y^2)的值为
已知1/x减1/y=-3,则(2x+xy-2y)/x-xy-y的值为
若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少?
已知1/x-1/y=2010,则分式(x+2xy-y)/(x-y)的值为多少?
xy=-1,x+y=2,则(xy-2y)+3x+5y的值为
若实数x,y满足1/x-1/y=5,则分式3x-2xy-3y/x+xy-y的值等于?
x+y=3,x的平方-y的平方-3xy=4,则x^2y+xy^2的值为多少?