the no. of possible integral values of m for which the circle ` x^2+y^2=4 and x^2+y^2-6x-8y+m^2=0` has exactly two common tangents are

Find the number of common tangents to the circle x^2 +y^2=4 and x^2+y^2−6x−8y−24=0

The number of common tangents to the circles x^2+y^2=4 and x^2+y^2-6x-8y-24=0 is

Find the number of common tangents to the circles x^2+y^2=4 and x^2+y^2-6x-8y=24

The one of possible real value of m for which the circles, x^(2)+y^(2)+4x+2(m^(2)+m)y+6=0 and x^(2)+y^(2)+(2y+1)(m^(2)+m)=0 intersect orthogonally is

The one of possible real value of m for which the circles, x^(2)+y^(2)+4x+2(m^(2)+m)y+6=0 and x^(2)+y^(2)+(2y+1)(m^(2)+m)=0 intersect orthogonally is

If the circles x^(2) +y^(2) - 6x – 8y +c = 0 and x^(2) + y^(2) =9 have three common tangent then c=