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# If x*y = xy – 2(x + y) for all integers x and y, then 2* (–3) =

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Manager
Joined: 16 Feb 2011
Posts: 240

Kudos [?]: 197 [0], given: 9

If x*y = xy – 2(x + y) for all integers x and y, then 2* (–3) = [#permalink]

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18 Aug 2011, 11:47
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Question Stats:

88% (00:34) correct 12% (00:34) wrong based on 141 sessions

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If x*y = xy – 2(x + y) for all integers x and y, then 2* (–3) =

(A) –16
(B) –11
(C) –4
(D) 4
(E) 16
[Reveal] Spoiler: OA

Kudos [?]: 197 [0], given: 9

VP
Status: Top MBA Admissions Consultant
Joined: 24 Jul 2011
Posts: 1347

Kudos [?]: 643 [0], given: 20

GMAT 1: 780 Q51 V48
GRE 1: 1540 Q800 V740
Re: If x*y = xy – 2(x + y) for all integers x and y, then 2* (–3) = [#permalink]

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18 Aug 2011, 11:55
The quickest (rather only) way is to apply the given formula:

2*(-3) = 2*(-3) - 2 (2 + (-3) ) = -6 +2 = -4

Option (C)
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Kudos [?]: 643 [0], given: 20

Director
Status: No dream is too large, no dreamer is too small
Joined: 14 Jul 2010
Posts: 614

Kudos [?]: 1139 [0], given: 39

Re: If x*y = xy – 2(x + y) for all integers x and y, then 2* (–3) = [#permalink]

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18 Aug 2011, 13:22
2*(-3) = -6 -2(2-3) = -6 - 4+6 = -4 Ans.
No other quickest way.
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Director
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Re: If x*y = xy – 2(x + y) for all integers x and y, then 2* (–3) = [#permalink]

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18 Aug 2011, 20:30
as per the expression 2*-3 = -6-(2*(2-3)) =-4

Kudos [?]: 144 [0], given: 42

GMAT Club Legend
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Re: If x*y = xy – 2(x + y) for all integers x and y, then 2* (–3) = [#permalink]

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23 Jan 2016, 03:48
Hello from the GMAT Club BumpBot!

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Re: If x*y = xy – 2(x + y) for all integers x and y, then 2* (–3) =   [#permalink] 23 Jan 2016, 03:48
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# If x*y = xy – 2(x + y) for all integers x and y, then 2* (–3) =

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