The circle C C\,C has equation x2+y2−2x+6y=26x^2 + y^2 - 2x + 6y = 26x2+y2−2x+6y=26
Find the coordinates of the centre of CCC.
Find the radius of CCC.
143 exam-style questions on AQA A Level Maths 1.6 C: Coordinate geometry in the (x, y) plane, covering 1.6.1 Equation of a straight line, 1.6.2 Coordinate geometry of the circle, 1.6.3 Parametric equations of curves (A-level only), and 1.6.4 Parametric equations in modelling (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.