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The equation of circle with centre (1 -2) and radius 4...

This question belongs to Arithmetic Ability Coordinate Geometry
Coordinate Geometry
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The equation of circle with centre (1, -2) and radius 4 cm is:

Answer & Solution
Correct Answer: Option D
(x - a)2 + (y - b)2 = r2
(x - 1)2 + [y - (-2)]2 = 42
x2 - 1 - 2x + y2 + 4 + 4y = 16
x2 + y2 - 2x + 4y = 11
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