已知x^2+y^2-10x-12y+61=0,求x/y-y/x的值

已知x^2+y^2-10x-12y+61=0,求x/y-y/x的值 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y除以2x-y 已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值 已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值 已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值 已知3x =2y 求x/x+y+y/x-y-y²/x²-y² 已知x^2+y^2-8x+12y+52=0 ,求1/2x-1/x-y(x-y/2x-x^2+y^2) 已知x^2+y^2-8x+12y+52=0 ,求1/2x-1/x-y(x-y/2x-x^2+y^2) 已知x^2+2x+y^2-6y+10=0 求（x+y)^2 已知x+y=2,则(x+y)^2-10x-10y+25=___. 已知x+y=2,则（x+y)2次方-10x-10y+25= 已知x^2+y^2-2x+6y+10,则x+y=? 已知x+y=4,x^2+y^2=10,求(x-y)^2 已知x^2+y^2=12,x+y=6,求x、y的值. 已知x^2+6x+y^2+10y=-34 求x.y 已知x+y=10,x^3+y^3=400,求x^2+y^2