若(x-2y)(x^2+2xy+4y^2)+8y^3=1,则x=

若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( ) 若x-y=4,xy=1,求(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值 已知xy/x+y=2,则代数式3x-5y+8y/-x+3xy-y的值 若(2x-14xy-2y)除以(x-2xy-y)=4,则1/x-1/y= 若1/x+1/y=2,则(2x-xy+2y)÷(3x+5xy+3y) 若1/x-1/y=3,求5x+2xy-5y/x-4xy-y的值 若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少? 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y* 已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y= 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-y=4xy，则2x+3xy-2yx-2xy-y 已知：x-y=1,xy=-2.求：(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值