9x squared - 12x = -5 completing the square

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2