Show that the tangent at `(-1,2)` of the circle `x^2 + y^2 - 4x -8y +7=0.` touches the circle `x^2+y^2+4x+6y=0` Also find its point of contact.

Show that the tangent at (-1, 2) of the circle x^(2) + y^(2) - 4x -8y + 7 = 0 touches the circle x^(2) + y^(2) + 4x + 6y = 0 and also find its point of contact.

Show that the tangent at (-1, 2) of the circle x^(2) + y^(2) - 4x -8y + 7 = 0 touches the circle x^(2) + y^(2) + 4x + 6y = 0 and also find its point of contact.

prove that the line 3x+4y+7=0 touches the circle x^2+y^2-4x-6y-12=0 also find the point of contact

If x=7 tonches the circle x^(2)+y^(2)-4 x-6 y-12=0 then the point of contact is

Show that x = 7 and y = 8 touch the circle x^(2) + y^(2) - 4x - 6y -1 2 = 0 and find the points of contact.

The length of the tangent from a point on the circle x^(2)+y^(2)+4x-6y-12=0 to the circle x^(2)+y^(2)+4x-6y+4=0 is

The length of the tangent from a point on the circle x^(2)+y^(2)+4x-6y-12=0 to the circle x^(2)+y^(2)+4x-6y+4=0 is

The length of the tangent drawn from any point on the circle : x^2+y^2 -4x+2y-4=0 to the circle x^2+y^2-4x+6y=0 is :