Same chapter3 marksDifficulty: Medium
Find the centre and radius of the circle x2 + y2 − 6x + 4y − 12 = 0.
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3 marksDifficulty: Medium
Find the equation of the circle passing through the origin with its centre at (3, 4).
Original Khojo Papers practice question — not from a past board paper.
Answer
x2 + y2 − 6x − 8y = 0
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The radius is the distance from the centre to the origin, that is 5, so the equation is (x − 3)2 + (y − 4)2 = 25, which expands to the form given.
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