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# R = 1-2xy+x2y2

Author Message
Manager
Joined: 27 Feb 2010
Posts: 106

Kudos [?]: 435 [0], given: 14

Location: Denver

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27 Apr 2010, 06:43
00:00

Difficulty:

(N/A)

Question Stats:

81% (58:21) correct 19% (01:42) wrong based on 101 sessions

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If R = 1-2xy+x2y2, what is the value of xy ? Note : x2y2 is x sqr y sqr

(1) R = 0
(2) x > 0

[Reveal] Spoiler:
A

Kudos [?]: 435 [0], given: 14

Manager
Joined: 07 May 2008
Posts: 79

Kudos [?]: 71 [0], given: 11

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27 Apr 2010, 07:23
R = (1-xy)^2

Statement 1 R=0

(1-xy)^2 = 0

Statement 1 is sufficient

Kudos [?]: 71 [0], given: 11

Senior Manager
Joined: 24 Jul 2009
Posts: 287

Kudos [?]: 167 [0], given: 0

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28 Apr 2010, 01:09
Statement 1 is enough. A

Kudos [?]: 167 [0], given: 0

Re: R = 1-2xy+x2y2   [#permalink] 28 Apr 2010, 01:09
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