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Quadratics

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Manager
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Joined: 14 Dec 2011
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GMAT 1: 630 Q48 V29
GMAT 2: 690 Q48 V37
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Kudos [?]: 6 [0], given: 24

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Quadratics [#permalink] New post 01 Jan 2012, 21:31
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

93% (01:13) correct 7% (00:21) wrong based on 14 sessions
What is the value of x?

(1) (x + 2)(x + 3) = 0

(2) x^2 + 5x + 6 = 0



I answered that both are sufficient alone...
Statement one tells me that X is -2 and -3
and I can do the same for statement two...why is this not the OA?
[Reveal] Spoiler: OA
1 KUDOS received
Manager
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Location: Pakistan
Concentration: International Business, Marketing
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Re: Quadratics [#permalink] New post 02 Jan 2012, 06:50
1
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You said it yourself mate but u forgot to put an "or" where and is in your calculation. x is unique, we want to find a unique value of x. Both the statements are similar and give the same information. x can either be -2 or -3. It cannot be both and since we cannot decide a unique value for x, even combined, both of them are insufficient. Hence E.
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Manager
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Joined: 14 Dec 2011
Posts: 65
GMAT 1: 630 Q48 V29
GMAT 2: 690 Q48 V37
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Kudos [?]: 6 [0], given: 24

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Re: Quadratics [#permalink] New post 03 Jan 2012, 00:16
Well, thanks for the answer...but the really should have asked for one special value!
Senior Manager
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Re: Quadratics [#permalink] New post 03 Jan 2012, 01:03
E is the answer here.

When the question asks, "What is the value of x?", it is imperative to find ONE AND ONLY ONE value for x.

Statement 1:
x = -2 or x = -3. This gives us two values for x. NOT SUFFICIENT.

Statement 2:
Can be written as (x + 2) (x + 3) = 0
This is the same as statement 1 and for exactly the same reason as above, NOT SUFFICIENT.

Combining the two statements, we still have two possible values for x. thus NOT SUFFICIENT.
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Re: Quadratics [#permalink] New post 03 Jan 2012, 01:26
Both give -2 and -3 but we are not sure about the the value of X so the answer is E
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Re: Quadratics [#permalink] New post 07 Jan 2012, 14:42
Princeton! no brainer that its easy...

1. Gives x = -2,-3
2. Same

Both statements same, so can't decide a value for x. E
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Please consider giving +1 Kudos if deserved!

DS - If negative answer only, still sufficient. No need to find exact solution.
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Re: Quadratics   [#permalink] 07 Jan 2012, 14:42
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