x^2+y^2-4x-6y+9=0 和x^2+y^2+12x+6y-19=0判断两圆的位置关系

判断x^2+y^2+6x-4y+9=0 和x^2+y^2-6x+12y+9=0位置关系 已知X,Y,满足(X+3Y)(X-3Y)=-10(Y^2-6/5)和2X(Y-1)+4(1/2X-1)=0 （X+Y)^2 X^2Y+XY^2注：*/* 是分数 求解简单的二元一次方程组x=3y-2和y=2x-y 2x=3y-12和4y=2x+1 3x-13y=-12和x+3y=2 2x-5y+13=0和9x+6y-8=0 (2x-2y)/3-(x-y)=-1和6(x+y)-4(2x-y)=16 解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1kkkkkkkk x+2y+2=0 7x-4y=-41 求x和y x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 已知x^2+y^2+13-4x+6y=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2 已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无 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 {x+2y+2=0 {7y-4y=-41 求X和Y 81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2 （x+y）/2- x-y/2=6 3(x+y)=4(x-y) x+y/3+x-y/2=6 4(x+y)-2(x-y)=40 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9