If the radius of the circle x2-y2-18 x-12 y-k-0 be 11 - then k -A- 347B- 4C- -4D- 49

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Obtaining centre and radius of a circle from general equation of a circle

If the radius...

Question

If the radius of the circle $x^{2} + y^{2} - 18 x + 12 y + k = 0$ be 11, then k =

347

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-4

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x^{2} + y^{2} - 18 x + 12 y + k = 0

x^{2} + y^{2} - 18 x - 12 y + k = 0

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