Find the *** centre of the three circles x2 + y2 = a2 , (x – c)2 + y2 = a2 and x2 + (y – b)2 = a2.
Here by using the formula
we will get equation of ** axis and by solving them we can obtain requird ** centre.
*** axis of first & second circle is given by
Also the *** axis of first and third circle is given by