For z^2 − 2z + 5 = 0, the roots are z = 1 ± 2i. What are |z| and the arguments Arg(z) for these roots?

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For z^2 − 2z + 5 = 0, the roots are z = 1 ± 2i. What are |z| and the arguments Arg(z) for these roots?

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