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Could you help me solve the problem?

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
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Source: — Quantitative Reasoning |
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by Tani » Sat Aug 07, 2010 11:46 am
substitute 3,4,and 5 - positive or negative (Pythagorean triplets) and see what you get.

e.g. 3+4-5 = 2
-3 -4 = 5 = -2
-3 +4 + 5 = 6
3 - 4 + 5 = 4

answer is B)1
Tani Wolff
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