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Find the equation of a circle concentric with the circle x2 plus y2-8x plus 6y-5 0 and passing through the point -2 -7?
DigvijayHadafb9094
Centre = (4, -3)
Radius2 = (4 + 2)2 + (-3 + 7)2 = 36 + 16 = 52
Equation = (x - 4)2 + (y + 3)2 = 52
or x2 - 8x + y2 + 6x = 27
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