若x+y=10,xy=24,则x^2+y^2=?
若x+y=10 xy=-1 则x²+y²=(x+y)²-2xy=
若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少?
7.X*X+2X+Y*Y-6Y+10=0,则xy=?
若正实数x.y满足x+y=xy,则x+2y的最小值
若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( )
[-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y-
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)
已知x-y=4xy,则2x+3xy-2yx-2xy-y
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*
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