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# Do square roots have only one solution in GMAT????

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Joined: 16 Feb 2008
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Do square roots have only one solution in GMAT???? [#permalink]  05 Apr 2008, 10:35
Hello,

I know that the square root of a number can be both positive and negative. For instance, square root of 4 can be +2 and -2.

However, in Manhattan GMAT Prep, Number properties book, it's stated that in GMAT follows the convention that root sign denotes only non-negative root of a number. Therefore, square root of 4 should always resolve to +2 in a GMAT question.

Do you agree with this? I find this hard to believe because I am sure I have solved many Data Sufficiency questions where I considered a square root to have two solutions, positive and negative. Looking forward to what you guys think?
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Joined: 17 Nov 2007
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Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
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Re: Do square roots have only one solution in GMAT???? [#permalink]  05 Apr 2008, 11:01
Expert's post
There are some thoughts about a root: 7-t59032
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Re: Do square roots have only one solution in GMAT???? [#permalink]  05 Apr 2008, 16:11
Thanks a lot! BTW, I posted a reply for your other question about what to do in DC. HTH.
Re: Do square roots have only one solution in GMAT????   [#permalink] 05 Apr 2008, 16:11
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