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canuckclint
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 Posted: Tue Nov 04, 2008 9:32 pm Post subject: abs value equation |
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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
x^2 – y^2 > 0 |
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logitech
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| Posted: Tue Nov 04, 2008 9:54 pm Post subject: Re: abs value equation |
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| canuckclint wrote: | 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
x^2 – y^2 > 0 |
|x| + |y| = -x – y
tells us both X and Y are negatives. We also know that XY is not 0, so X and Y are not 0
X+Y = needs to be negative too.
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Logitech
2009 is not a prime number! |
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cramya
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| Posted: Tue Nov 04, 2008 10:03 pm Post subject: |
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| b) is what I get (since its must be true) |
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logitech
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| Posted: Tue Nov 04, 2008 10:04 pm Post subject: |
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| cramya wrote: | | b) is what I get (since its must be true) |
Now this is called confidence! 8)
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Logitech
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raunekk
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| Posted: Tue Nov 04, 2008 10:13 pm Post subject: |
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| one more for B... |
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canuckclint
Really wants to Beat The GMAT!
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| Posted: Tue Nov 04, 2008 10:23 pm Post subject: |
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| me three for B |
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Fab
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| Posted: Wed Nov 05, 2008 10:17 am Post subject: |
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B either.
IXI + IYI = -(X+Y), so: + = -(-)
Then, X+Y<0
Hope it helps. |
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Fab
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| Posted: Wed Nov 05, 2008 10:20 am Post subject: |
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B either.
IXI + IYI = -(X+Y), so: + = -(-)
Then, X+Y<0
Hope it helps. |
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Fab
Rising GMAT Star
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Target GMAT Score: 700
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| Posted: Wed Nov 05, 2008 10:20 am Post subject: |
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B either.
IXI + IYI = -(X+Y), so: + = -(-)
Then, X+Y<0
Hope it helps. |
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vivek.kapoor83
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| Posted: Wed Nov 05, 2008 11:38 am Post subject: |
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| 1 more vote for B>>>>>>>>>>>>>>>>>>>>>..OA pls |
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