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What is the value of \(|a + b|?\)
(1) \((a + b + c + d) (a + b - c - d) = 16\)
(2) \(c + d = 3\)
Answer: C
Source: Manhattan GMAT
(1) \((a + b + c + d) (a + b - c - d) = 16\)
(2) \(c + d = 3\)
Answer: C
Source: Manhattan GMAT
