The circle C C\,C has equation x2+y2+8x−4y−14=0x^2 + y^2 + 8x - 4y - 14 = 0x2+y2+8x−4y−14=0
Find the coordinates of the centre of C C\,C and the exact radius of CCC.
Show that the point (1,5)(1, 5)(1,5) lies on CCC.
60 exam-style questions on AQA A Level Maths 1.6.2 Coordinate geometry of the circle. Each one has a worked solution and a mark scheme showing where the marks go.