AM-721
Equation of a circle (centre–radius form)
A Math · Secondary 3 · Medium · Equation of a circle (centre–radius form)
A circle has equation
(x−1)2+(y+4)2=20. What is the equation of the circle in the general form
x2+y2+gx+fy+c=0?
- x2+y2−2x+8y−3=0
- x2+y2+2x−8y−3=0
- x2+y2−2x+8y+3=0
- x2+y2+2x+8y−3=0
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