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R = 1 + 2xy + x^2y^2, what is the value of xy?

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R = 1 + 2xy + x^2y^2, what is the value of xy? [#permalink] New post 14 Oct 2010, 19:56
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R = 1 + 2xy + x^2y^2, what is the value of xy?

(1) R = 0
(2) x > 0
[Reveal] Spoiler: OA

Last edited by Bunuel on 05 Mar 2015, 05:19, edited 2 times in total.
Renamed the topic and edited the question.
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Re: R = 1 + 2xy + x^2y^2, what is the value of xy? [#permalink] New post 15 Oct 2010, 01:20
satishreddy wrote:
R=1+2xy+x^y^, what is the value of xy

1) R=0
2) x>0

OA : A


I think the question you posted is incomplete.

what does y^ mean?? There will be some digit aftger y^.
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Re: R = 1 + 2xy + x^2y^2, what is the value of xy? [#permalink] New post 15 Oct 2010, 02:30
Expert's post
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satishreddy wrote:
R=1+2xy+x^2*y^2, what is the value of xy

1) R=0
2) x>0

OA : A


Question should be:


R=1+2xy+x^2*y^2, what is the value of xy?

(1) R=0 --> \(1+2xy+x^2*y^2=0\) --> \((xy+1)^2=0\) --> \(xy=-1\). Sufficient.
(2) x>0 --> Clearly insufficient.

Answer: A.


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Re: R = 1 + 2xy + x^2y^2, what is the value of xy? [#permalink] New post 17 Oct 2010, 23:39
Certainly a tricky one. Thanks for posting
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Re: R = 1 + 2xy + x^2y^2, what is the value of xy? [#permalink] New post 05 Mar 2015, 00:09
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: R = 1 + 2xy + x^2y^2, what is the value of xy?   [#permalink] 05 Mar 2015, 00:09
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