(1)  the two circle x²+y²-2x+6y+6=0  and x²+y²-5x+6y+15=0 touch each other . the equation  of  there common tangents is.

We know tat equation for the common tangent to any two circles is equal to

             T : C₁ - C_{2 = 0}

 _{Hence equation of tangent is : 3x-9  = 0}

                                                _{: x-3 = 0}

_{rate me if i m correct.............}