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# Sq. Root

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Director
Joined: 12 Oct 2008
Posts: 547
Followers: 3

Kudos [?]: 483 [0], given: 2

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28 Oct 2009, 16:12
00:00

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If x < 0, then √(-x│x│) is

A. -x
B. -1
C. 1
D. x
E. √x
[Reveal] Spoiler:
OA D IMO A
SVP
Joined: 29 Aug 2007
Posts: 2476
Followers: 70

Kudos [?]: 774 [1] , given: 19

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28 Oct 2009, 18:31
1
KUDOS
If x < 0, then √(-x│x│) is

A. -x
B. -1
C. 1
D. x
E. √x
[Reveal] Spoiler:
OA D IMO A

Should be A not D.

Suppose x = -5
= √(-x│x│)
= √(-(-5)│-5│)
= √(5x5)
= √(25)
= 5

5 = -x = -(-5)
Thats A.
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Manager
Joined: 15 Sep 2009
Posts: 136
Followers: 1

Kudos [?]: 24 [0], given: 2

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29 Oct 2009, 04:41
I will choose option A
Re: Sq. Root   [#permalink] 29 Oct 2009, 04:41
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