What is the equation of the circle with centre (,0) and radius 2? (2a- 1)2 + y? = 2 4. (2x-1)2 + y? = 2 2 (2= - 1)" + -4 + y? = 4 4 %3D (2x- 1)2 - + y? = 4 %3D 2

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