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1. $25 x^{2} = y^{2} - 4$

A. $25 x^{2} + 4 = y^{2}$
B. $25 x^{2} + 4 = y^{2}$
C. $25 x^{2} + 4 = y^{2}$
D. $25 x^{2} + 4 = y^{2}$

Answer: Option D

Explanation:

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