sqrt(x) = +/-x

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hey_thr67: Master | Next Rank: 500 Posts; Posts: 299; Joined: Tue Feb 15, 2011 10:27 am; Thanked: 9 times; Followed by:2 members

by hey_thr67 » Mon Jun 25, 2012 9:25 am

I often get confused about sqrt when is the rersult +ve or -ve

Source: Beat The GMAT — Problem Solving | Mon Jun 25, 2012 9:25 am

eagleeye: Legendary Member; Posts: 520; Joined: Sat Apr 28, 2012 9:12 pm; Thanked: 339 times; Followed by:49 members; GMAT Score:770

by eagleeye » Mon Jun 25, 2012 9:31 am

hey_thr67 wrote:I often get confused about sqrt when is the rersult +ve or -ve

Hi hey_thr67:

In GMATland, sqrt(x) is ALWAYS positive. You may find this post helpful:
https://www.beatthegmat.com/squares-squa ... 13333.html

Let me know if this helps

Anurag@Gurome: GMAT Instructor; Posts: 3835; Joined: Fri Apr 02, 2010 10:00 pm; Location: Milpitas, CA; Thanked: 1854 times; Followed by:523 members; GMAT Score:770

by Anurag@Gurome » Mon Jun 25, 2012 9:41 am

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