圆x^2+y^2-8x+6y=0与x^2+y^2+4x-6y-12=0关于直线-----对称

【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值 已知X*X+Y*Y+6X-8Y+25=0 求（Y/X)+(X/Y)-2=? 圆x^2+y^2-8x+6y=0与x^2+y^2+4x-6y-12=0关于直线-----对称 两圆x^2+y^2-6x+16y=0与x^2+y^2+4x-8y-44=0的公切线条数 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 2x-y=0与x+y=10 已知x.x+y.y+8x+6y+25=0,求代数式(x.x-4y.y)/(x.x+4xy+4y.y)-x/(x+2y)的值 已知圆x^2+y^2+x-6y+m=0与直线x+2y-3 2X-5Y+13=0 9X+6Y-8=0 求X与Y的值 {x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0 圆x^2+y^2-4x+2y+4=0与圆x^2+y^2+2x-6y-26=0的位置关系 圆x^2+y^2+4x-6y+4=0与圆x^2+y^2+2x-4y-4=0的交点坐标 判定圆x^2+y^2-6x+4y+12=0与圆x^2+y^2-14x-12y+14=0是否相切? 判断圆X²+Y²-6X+4Y+12=0与圆X²+Y²-14X-2Y+14=0是否相切 圆C1：X*X+Y*Y+2Y-6Y-26=0与圆C2：X*X+Y*Y-4X+2y+4=0的公切线有多少条 与圆x^2+y^2-4x=0外切,又与y轴相切的圆的圆心轨迹方程是A.y^2=8x B.y^2=8x(x>0)和y=0 C.y^2=8x(x>0) D.y^2=8x(x>0)和y=0(x