CircleMedium
Question
If a be the radius of a circle which touches x-axis at the origin, then its equation is -
Options
A.x2 + y2 + ax = 0
B.x2 + y2 ± 2ya = 0
C.x2 + y2 ± 2xa = 0
D.x2 + y2 + ya = 0
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