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# For all x and y, (x + 1)(y + 1) – x – y =

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Math Expert
Joined: 02 Sep 2009
Posts: 58445
For all x and y, (x + 1)(y + 1) – x – y =  [#permalink]

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14 Jan 2019, 03:04
00:00

Difficulty:

5% (low)

Question Stats:

95% (00:47) correct 5% (03:19) wrong based on 30 sessions

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For all x and y, (x + 1)(y + 1) – x – y =

A. xy – x – y + 1
B. xy + 1
C. –x – y + 1
D. x^2 + y^2 – 1
E. 1

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Joined: 31 Oct 2013
Posts: 1465
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
Re: For all x and y, (x + 1)(y + 1) – x – y =  [#permalink]

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14 Jan 2019, 03:22
Bunuel wrote:
For all x and y, (x + 1)(y + 1) – x – y =

A. xy – x – y + 1
B. xy + 1
C. –x – y + 1
D. x^2 + y^2 – 1
E. 1

(x + 1)(y + 1) – x – y

= xy + x + y + 1 - x - y

=xy + 1

Senior Manager
Joined: 13 Jan 2018
Posts: 342
Location: India
Concentration: Operations, General Management
GMAT 1: 580 Q47 V23
GMAT 2: 640 Q49 V27
GPA: 4
WE: Consulting (Consulting)
Re: For all x and y, (x + 1)(y + 1) – x – y =  [#permalink]

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14 Jan 2019, 04:12
xy + x + y + 1 - x - y

xy + 1

OPTION: B
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Chaitanya

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Joined: 18 Aug 2017
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Location: India
Concentration: Sustainability, Marketing
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WE: Marketing (Energy and Utilities)
Re: For all x and y, (x + 1)(y + 1) – x – y =  [#permalink]

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14 Jan 2019, 04:13
Bunuel wrote:
For all x and y, (x + 1)(y + 1) – x – y =

A. xy – x – y + 1
B. xy + 1
C. –x – y + 1
D. x^2 + y^2 – 1
E. 1

solve te expression
we get xy+1
IMO B
Re: For all x and y, (x + 1)(y + 1) – x – y =   [#permalink] 14 Jan 2019, 04:13
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