So heres how it goes. Find the coordinates of the centre and the radius of the circle x^2 + y^2 - 4x + 6y -12 =0 a)If the circle cuts the x-axis at the points A and B , find the length of line segment AB. My question is , I have actually found 2 points , they are (-2,0) and (6,0) However , How do I know which point is A or which point is B? in the answer sheet , (-2,0) is A , but can anyone explain why? Why cant A be (6,0)?