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# HARD PS GMAT PREP

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Manager
Joined: 08 May 2004
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HARD PS GMAT PREP [#permalink]  06 Aug 2006, 14:34
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Helppp
Totally lost on how to solve the problem
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Manager
Joined: 26 Jun 2006
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Try plugging numbers x=1 and y=1 and you will see that only II is true

Another way is square all expressions and go from there. It also leads to II, but it could take longer, IMO
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