5x^2+6xy+2y^2-14x-8y+10=0

7.X*X+2X+Y*Y-6Y+10=0,则xy=? 已知x>0,y>0,且x+6y=5根号xy,求(2x+根号xy-y)分之(x+根号xy+2y)的值 [-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(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* x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8 若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值 x^2-2xy+y^2+6y+10=0求x,y的值. x的平方-2xy+y的平方-6y+10=0,求x,y x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值 已知x^2+y^2-4x+6y+13=0求(xy+y^2/5x^2-5xy+xy+y^2)·（5/x+y）-（y/x-y 已知x+4y-2x+8y+5=0,求x^4-y^4/2x+xy-y·2x-y/xy-y÷(x+y/y)的值. 已知xy/x+y=2,则代数式3x-5y+8y/-x+3xy-y的值