AM-2401

Equation of a circle (centre–radius form)

A Math · Secondary 4 · Medium · Equation of a circle (centre–radius form)

1. $x^2+y^2-2x+4y-20=0$
2. $x^2+y^2+2x-4y-20=0$
3. $x^2+y^2-2x+4y+20=0$
4. $x^2+y^2+2x+4y-20=0$

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