A circle has centre

MATHEMATICS · Subjective · A Level · Mathematics · Coordinate geometry in the (x y) plane · Coordinate geometry in the (x y) plane

Problem

A circle has centre (2,−3)(\sqrt{2},-\sqrt{3}). Its radius is equal to the distance between the centre and the point (a,1)(a,1). Write the expanded equation of this circle in terms of the parameter aa.

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