The circle C C\,C has the equation x2+y2−6x+2y=6x^2 + y^2 - 6x + 2y = 6x2+y2−6x+2y=6
Find the coordinates of the centre and the radius of CCC.
C C\,C crosses the y y\,y axis at the points A A\,A and BBB. Find the coordinates of the points A A\,A and BBB.