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# DS4-25

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SVP
Joined: 16 Oct 2003
Posts: 1798

Kudos [?]: 173 [0], given: 0

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11 Jun 2004, 19:38
00:00

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ans with exp
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Kudos [?]: 173 [0], given: 0

GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4284

Kudos [?]: 537 [0], given: 0

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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
_________________

Best Regards,

Paul

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Manager
Joined: 07 May 2004
Posts: 183

Kudos [?]: 18 [0], given: 0

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.

Kudos [?]: 18 [0], given: 0

SVP
Joined: 30 Oct 2003
Posts: 1788

Kudos [?]: 114 [0], given: 0

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)

Kudos [?]: 114 [0], given: 0

12 Jun 2004, 07:22
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# DS4-25

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