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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]  14 Oct 2010, 19:56
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45% (medium)

Question Stats:

55% (01:47) correct 45% (01:12) wrong based on 62 sessions
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]  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]  15 Oct 2010, 02:30
Expert's post
2
This post was
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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.

 ! Please post PS questions in the PS subforum: gmat-problem-solving-ps-140/Please post DS questions in the DS subforum: gmat-data-sufficiency-ds-141/

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