Enrich · Stage 5 · Non-linear relationships C (Path)

Enrich Find the centre and radius of a circle with the equation in the form x² + y² + ax + by + c = 0 by completing the square

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  NRICH: Parabolic Patterns
  NRICH (University of Cambridge) · Web page · Free · Link checked 2026-10-15 · Low floor high ceiling, Teacher notes
  Use it for: Low-floor, high-ceiling NRICH task extending this dot point; use for extension or a problem-solving lesson.