1.3 · Coordinate geometryLesson 7 of 13
The expanded form of the equation of a circle
Complete the square twice to find the centre and radius from x² + y² + 2gx + 2fy + c = 0.
Locked
Unlock the rest of Cambridge A Level Mathematics: Pure 1 (9709 Paper 1).
- Every lesson, every resource, unlocked instantly.
- Track progress and pick up where you left off.
- Free preview lessons stay readable from the outline.