已知x^2-6xy+y^2+10y+34=0求x和y的值

已知x平方+y平方-10x-6y+34=0求(x-y/x+y)平方/x平方-y平方/xy乘x平方+2xy+y平方/x平方-xy的值 已知x+y=-2,求代数式(6xy+10y)+[4x-2(3xy+2y-x)] 已知x^2-6xy+y^2+10y+34=0求x和y的值 已知X+y=6,xy=7 求x^2y+xy^2=已知X+y=6,xy=7 x^2y+xy^2 已知x-xy=10,xy-y=2,则x-y=（ ）,-2xy+x+y=（ ）. 已知x-xy=20,xy-y=-10,则x-y=( ),x+y-2xy=( ). 已知x-xy＝20,xy-y＝-10,则x-y＝?x+y-2xy＝? 已知x-xy=20,xy-y=-10,则x-y=?,x+y-2xy? 已知xy/x+y=6,求3x-2xy+3y/-x+3xy-y的值. 已知(xy)/(x+y)=6求(3x-2xy+3y)/(-x+3xy-y)的值. 已知xy=-2,x-y=3,求（x+y)（x-y)-y^2+（x-y)^2-（6x^2y-2xy^2)÷2y 已知:x/y=-2,求x^2-2xy-3y^2/x^-6xy 已知x²+y²-10x-6y+34=0,求2x²-2y²分之4x²-8xy+4y² 已知x^2+9y^2-2x-6y+2=0,求{-（xy/（x-y）^2}^4*(y^2-xy/x)^3*x^4/y^10/(x/xy-y^2)^5的值 已知实数xy,满足10x²-2xy+y²+6x+1=0,求x+y 已知X-Y=5,XY=3,求(6X-4Y+5XY)-(3X-Y+2XY)的值给10 1.已知x+y=-4,xy=3,求5（2分之1xy+2y）+[6x-(2xy+y-3x)]的值2.已知（x+3）^2+|x-y+10|=0求代数式5x^2y-[2x^2y-(3xy-xy^2)-3x^2]-2xy^2-y^2的值 已知x+y=6,xy=4,求x^2y+xy^2的值~