JEE-Mains 2015 (20/30)

Geometry Level 3

{x2+y24x6y12=0x2+y2+6x+18y+26=0\begin{cases} x^2+y^2-4x-6y-12=0 \\ x^2+y^2+6x+18y+26=0 \end{cases}
The number of common tangents to the above two circles is :

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