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Inequality: GMAT prep

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Senior Manager
Senior Manager
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Joined: 02 Dec 2007
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Inequality: GMAT prep [#permalink] New post 26 Sep 2008, 11:50
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Director
Director
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Joined: 27 Jun 2008
Posts: 547
WE 1: Investment Banking - 6yrs
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Kudos [?]: 52 [0], given: 92

Re: Inequality: GMAT prep [#permalink] New post 26 Sep 2008, 11:58
D

(1)
Any number^2 = either -or+ will be positive.
x = -2 or +2
x^2 = 4
SUFF

(2)
Let x = 3, y = 2
2*3 - 3*2 < 3^2
0<9...its always true for any +ve number
Manager
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Schools: The School that shall not be named
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Re: Inequality: GMAT prep [#permalink] New post 26 Sep 2008, 12:56
For B:

Assume X=2, Y=0
Then
\(2X-3Y = 4
X^2=4\)
Since we can see that at the extreme case the 2 sides are equal, it is not hard to see that if \(Y > 0, 2X-3Y<X^2\)
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Re: Inequality: GMAT prep   [#permalink] 26 Sep 2008, 12:56
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Inequality: GMAT prep

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