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# DS4-25

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SVP
Joined: 16 Oct 2003
Posts: 1801

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11 Jun 2004, 19:38
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

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ans with exp
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GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4288

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11 Jun 2004, 19:54
B it is
from 1) could be 0 or 1
From 2) only 0 fits the bill
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Best Regards,

Paul

Manager
Joined: 07 May 2004
Posts: 183
Location: Ukraine, Russia(part-time)

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12 Jun 2004, 01:58
Bhai wrote:
ans with exp

2 alone is sufficient:

x^2 = -x^2 => x^2 = 0 => x = 0.
SVP
Joined: 30 Oct 2003
Posts: 1790
Location: NewJersey USA

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12 Jun 2004, 07:22
A) x(x-1)(x+1) = 0 x = { 0,1,-1} not sufficient
B) only x = 0 satisfies this equation (Sufficient)
12 Jun 2004, 07:22
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