" The circle "x^(2)+y^(2)+4x-4y+4=0" touches "

The circle x ^(2) +y^(2) -8 x+4=0 touches -

The circle x^(2) + y^(2)- 8x + 4y + 4=0 touches

If the circle x^(2)+y^(2)+8x-4y+c=0 touches the circle x^(2)+y^(2)+2x+4y-11=0 externally and cuts the circle x^(2)+y^(2)-6x+8y+k=0 orthogonally then k

The circle x^2 + y^2 - 8x + 4y +4 = 0 touches

Show that the circle 4x^(2)+4y^(2)-12x-12y+9=0 touches both the coordinate axes.

If the circle x^(2) + y^(2) + 8x - 4y + c = 0 touches the circle x^(2) + y^(2) + 2x + 4y - 11 = 0 externally and cuts the circle x^(2) + y^(2) - 6x + 8y + k = 0 orthogonally then k =

If x + y+ k =0 touches the circle x ^(2) + y^(2) -2x -4y + 3 =0, then k can be

If x + y+ k =0 touches the circle x ^(2) + y^(2) -2x -4y + 3 =0, then k can be