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A. [sb² + r² (2bd + sd)²]/(r² – s²)
B. [sb² + r² (2bd + sd)²]/(r² – s5)
C. [sb² + r² (2bd + sd)²]/(r – s)
D. None of these

Correct Answer: [sb² + r² (2bd + sd)²]/(r² – s²)

Last Updated: January 20, 2019