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\((\sqrt{9+\sqrt{80}}+\sqrt{9-\sqrt{80}})^2=\)
A. \(1\)
B. \(9-4\sqrt5\)
C. \(18-4\sqrt5\)
D. \(18\)
E. \(20\)
Answer: E
Source: GMAT Prep
A. \(1\)
B. \(9-4\sqrt5\)
C. \(18-4\sqrt5\)
D. \(18\)
E. \(20\)
Answer: E
Source: GMAT Prep
