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## Good inequality...

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amit.trivedi@ymail.com GMAT Destroyer!
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Good inequality... Mon May 07, 2012 1:30 am
Elapsed Time: 00:00
• Lap #[LAPCOUNT] ([LAPTIME])
"If x is negative, is x < -3 ?

(1) x^2 > 9
(2) x^3 < -9 "

I donot have the OA but when I solved the question, I got the answer as E. Is it correct? Could any of the experts please help?

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GmatKiss GMAT Titan
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Mon May 07, 2012 1:56 am
imo: D

mathbyvemuri Really wants to Beat The GMAT!
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Mon May 07, 2012 1:59 am
statement(1): x^2 > 9 => x < -3 or x > 3
There is ambiguity here and hence, (1) alone is not sufficient

statement(2): x^3 < -9 => x < -2.something
There is ambiguity again as it is asked whether x < -3. Hence, (2) alone is not sufficient

But if we consider both the statements together, the common possible solution is: x < -3, which is sufficient and hence option "C"

aneesh.kg GMAT Destroyer!
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Mon May 07, 2012 2:15 am
Guys,
the answer is (A).

You can read it here:
http://www.beatthegmat.com/good-inequality-t111524.html#470202

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Bill@VeritasPrep GMAT Instructor
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Mon May 07, 2012 8:32 am
mathbyvemuri wrote:
statement(1): x^2 > 9 => x < -3 or x > 3
There is ambiguity here and hence, (1) alone is not sufficient

statement(2): x^3 < -9 => x < -2.something
There is ambiguity again as it is asked whether x < -3. Hence, (2) alone is not sufficient

But if we consider both the statements together, the common possible solution is: x < -3, which is sufficient and hence option "C"
Statement 1 works because the stem specifically mentions that x must be negative.

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zueswoods Rising GMAT Star
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Mon May 07, 2012 9:07 am
I believe the answer is A

The if you draw the graphs you will get the solutions, also, remeber the question stem says X < 0 so X>3 is not an option.

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