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Question

The equation of circle with centre at (2, -3) and radius 5 is

A
x2+y24x+6y12=0
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B
x2+y2+4x+6y12=0
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C
x2+y24x6y+12=0
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D
x2+y2+4x+6y+12=0
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Solution

The correct option is A x2+y24x+6y12=0
Equation of circle with centre (h.k) and radius r is :
(xh)2+(yk)2=r2
Hence, equation of circle with centre (2,-3) and radius 5 is :
(x2)2+(y+3)2=25
x2+44x+y2+9+6y=25
x2+y24x+6y12=0

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