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how to make this equation true??

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by hongwang9703 » Fri Nov 06, 2009 4:22 pm
If |x| + |y| = -x - y and xy does not equal 0, which of the following must be true?

x + y > 0
x + y < 0
x - y > 0
x - y < 0
x2 - y2 > 0


|x| + |y| = -x - y im confused as what numbers satisfy this equation! plz assist!
i got utterly defeated by the gmat.
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by palvarez » Sat Nov 07, 2009 5:44 pm
Hey

I am seeing weird signs in ur question like â€"

Can you retype it, instead of cut n paste.
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by xcusemeplz2009 » Sat Nov 07, 2009 7:11 pm
imo d
It does not matter how many times you get knocked down , but how many times you get up
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by Chayakan » Mon Nov 09, 2009 5:41 pm
IMO D

If X = -2 and Y = 2, then we will have
|-2| + |2| = -(-2) x 2
4 = 4

In choice D ... X x Y < 0 from abouve we also have (-2) x (2) < 0
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by hongwang9703 » Tue Nov 10, 2009 6:16 pm
opz sorry about that here is the question

|X|+|y| = - X - Y and xy does not equal 0, which of the following must be true?

x + y > 0
x + y < 0
x - y > 0
x - y < 0
x2 - y2 > 0
i got utterly defeated by the gmat.
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