|m+4|=2 m=? 1) m<0 2) m^2+8m+12=0 : DS Archive
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|m+4|=2 m=? 1) m<0 2) m^2+8m+12=0

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|m+4|=2 m=? 1) m<0 2) m^2+8m+12=0 [#permalink]

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05 May 2006, 23:25
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|m+4|=2 m=?

1) m<0
2) m^2+8m+12=0
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05 May 2006, 23:29
getzgetzu wrote:
|m+4|=2 m=?

1) m<0
2) m^2+8m+12=0

m = -6 or -2

E

(1) Insufficient
(2) m = -6 or -2
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Last edited by TeHCM on 05 May 2006, 23:51, edited 1 time in total.
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05 May 2006, 23:48
Crap, I made an elementary mistake
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Don't be afraid to take a flying leap of faith.. If you risk nothing, than you gain nothing...

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06 May 2006, 00:03
1
KUDOS
Even Watson used to make 'elementary' mistakes... Dont worry!
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07 May 2006, 11:28
sm176811 wrote:

m= -6

I am getting E as well.

From the question we know: m=-2 or m=-6

From Statement 1: It can be anything
From Statement 2: m = -2 or m =-6

Taken both together...insufficient
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07 May 2006, 11:35
shevy wrote:
sm176811 wrote:

m= -6

I am getting E as well.

From the question we know: m=-2 or m=-6

From Statement 1: It can be anything
From Statement 2: m = -2 or m =-6

Taken both together...insufficient

Isn't the answer the common as highlighted above? i.e. m = -6.
Hence B.
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07 May 2006, 11:56
Yeah, this is E. We can't eliminate m = -2 or m = -6. they are both valid.
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08 May 2006, 08:30
the modulus equation can have two solutions: -6, -2.
st 1 is insufficient, since it is appropriate for both solutions.
st 2 is also insufficient, since its solutions are also -6,-2
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08 May 2006, 09:54
Agreed... Not sure how I made silly factorization mistakes!
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08 May 2006, 10:34
Ans is E

1) M<O= It can be anything less than 0

2) After calculation we get m=-6 or -2

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08 May 2006, 21:08
St1: m < 0, so m = -6 or m = -2. Insufficient.

St2: m^2+8m+12=0 --> (m+2)(m+6) = 0
m = -2, m = -6. Insufficient.

Using St1 and St2:
Does not help us narrow to one value of m. Insufficient.

Ans E
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10 May 2006, 08:44
Agreed...E.

1) m=-6 or m=-2
2) Same
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10 May 2006, 09:46
agree with E.

sm176811 wrote:
Agreed... Not sure how I made silly factorization mistakes!

Don't worry!. We all do such mistakes as no one is perfect. Even Watson used to make 'elementary' mistakes...
10 May 2006, 09:46
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