x^(2)-y^(2)+6y-9

The total number of common tangentss of x^(2)+y^(2) -6x-8y+9=0 and x^(2)+y^(2)=1 is

The inverse of the point (1, 2) with respect to the circle x^(2) + y^(2) - 4x - 6y + 9 = 0 is

The inverse of the point (1, 2) with respect to the circle x^(2) + y^(2) - 4x - 6y + 9 = 0 is

The circles x^(2)+ y^(2) -6x-2y +9 = 0 and x^(2) + y^(2) =18 are such that they :

The circles x^(2)+ y^(2) -6x-2y +9 = 0 and x^(2) + y^(2) =18 are such that they :

Equation of tangents drawn from (0, 0) to x^(2) + y^(2) - 6x -6y + 9 = 0 are

Equation of tangents drawn from (0, 0) to x^(2) + y^(2) - 6x -6y + 9 = 0 are

Prove that the circles x^(2)+y^(2)-6x-6y+9=0 and x^(2)+y^(2)+6x+6y+9=0 are such that (A) they do not intersect.(B) their exterior common tangents are parallel (C) their interior common tangents are perpendicular.

Find the external centre of similitude for the circles x^(2) + y^(2) - 2x - 6y + 9 =0 and x^(2) + y^(2) = 4