The difference between the radii of the largest and smallest circles which have their centres on the circumference of the circle `x^2 + y^2 + 2x + 4y -4 = 0` and passes through point (a,b) lying outside the circle is :

The difference between the radii of the largest and the smallest circles which have their centre on the circumference of the circle x^2+y^2+2x+4y-4=0 and pass through the point (a,b) lying outside the given circle,is

Equation of the diameter of the circle x^(2) +y^(2) - 2x + 4y = 0 which passes through the origin is

Find the equation of the circle concentric with the circle x^2 +y^2 - 4x - 6y-9=0 and passing through the point (-4, -5)

Find the equation of the circle concentric with the circle x^2 +y^2 - 4x - 6y-9=0 and passing through the point (-4, -5)

The equation of the circle concentric with the circle x ^(2) + y^(2) -4x-6y =0 and passing through the point (-4,-5) is

Let r _(1) and r _(2) be the radii of the largest and smallest circles, respectively, which pass through the point (–4,1) and having their centres on the circumference of the circle x ^(2) + y ^(2) + 2x + 4y - 4 =0 . If (r _(1))/(r _(2)) = a + b sqrt2. then a + b is equal to .

Find the equation of the circle concentric with the circle x^(2) + y^(2) + 4x + 4y + 11 = 0 and passing through the point ( 5, 4).

Find the equation of the circle concentric with the circle x^(2) + y^(2) - 4x + 6y + 4 = 0 and passing through the point (2, -2).

Equation of the circle concentric with the circle x^(2)+y^(2)-3x+4y-c=0 and passing through the point [(-1,-2) is

Find the equation of the circle concentric with the circle x^2 + y^2+4x+ 6y+11=0 and Passing through the point (5, 4).