If a circle C passing through the point (4, 0) touches the circle x2 + – McqOptions

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1.	If a circle C passing through the point (4, 0) touches the circle x2 + y2 + 4x – 6y = 12 externally at the point (1, -1), then the radius of C is:
A.	2√5
B.	4
C.	5
D.	√57
Answer» D. √57

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