Question

X to the power of 2 plus Y to the power of 2 plus 4x-2y=1

The equation of a circle in a xy plane is shown above. what is the radius of the circle.
A) 2
B) 3
C) 4
D) 9
I have no idea what the answer is

Answer 1

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answer:a.2

Answer 2

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Explanation: