Question 1207932
Put each equation into the form needed, and you can then read the center points directly from each equation.


{{{x^2-4x+y^2+6y=-4}}}

Without explanation, the terms needed for complete-the -squares are  4 and 9.


{{{x^2-4x+4+y^2+6y+9=-4+4+9}}}


{{{(x-2)^2+(y+3)^2=9}}}----------and this is for the first equation, showing that center point is (2, -3).


YOU do the other equation, and use the two centers to find the line asked-for.