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I want to plot the $z\in\mathbb{C}$ such that $|z-a|=2$ using the CDF function.

What I have tried is

a = CDF(3,0)
C1 = solve(CDF(z-a).abs()==2,z)

But I cannot use a symbolic expression.

My idea is to plot the points given in C. I would really appreciate any answer solving the problem using the ComplexDoubleField.