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1. $x^{2} + y^{2} = 9$

A. $x + y \pm 3 \sqrt{2} = 0$
B. $x + y \pm 3 \sqrt{2} = 0$
C. $x + y \pm 3 \sqrt{2} = 0$
D. $x + y \pm 3 \sqrt{2} = 0$

Answer: Option B

Explanation:

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