Find 'all equation to the four common tangents to the circles `x^2 + y^2= 25` and `(x-12)^2+y^2=9`

A common tangent to the circles x^(2)+y^(2)=4 and (x-3)^(2)+y^(2)=1 , is

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

Find the equation of the common tangent to the circle x^2 + y^2 = 16 and the ellipse 4x^2 + 25y^2 = 100 cutting off positive intercepts on the axes of reference. Also, find the intercept on the common tangent between the coordinate axes.

Find the equations of the common tangents to the circle x^(2)+y^(2)=8 and the parabola y^(2)=16x

Find the equations to the common tangents of the circles x^(2)+y^(2)-2x-6y+9=0 and x^(2)+y^(2)+6x-2y+1=0

Find the equation of the tangents through (7,1) to the circle x^(2)+y^(2)=25

The number of common tangents to the circles x^(2)+y^(2)-y=0and x^(2)+y^(2)+y=0 is