Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 05 Jul 2015, 23:21

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Is it true that square root symbol means +ve sq root only?

Author Message
TAGS:
Intern
Joined: 17 Jul 2003
Posts: 33
Location: New York
Followers: 0

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

Is it true that square root symbol means +ve sq root only? [#permalink]  07 Sep 2003, 20:02
Hi, I hope this is the right place to ask this question.
As far as the GMAT is concerned, does the symbol for the square root of a number (don't know how to type it here) mean the positive square root only?
For example, even though there are 2 numbers whose square is 9, if I see square root 9 on the gmat, should I assume it means the positive number 3 only?
Thank you very much!
 Kaplan Promo Code Knewton GMAT Discount Codes Manhattan GMAT Discount Codes
SVP
Joined: 30 Oct 2003
Posts: 1794
Location: NewJersey USA
Followers: 5

Kudos [?]: 43 [0], given: 0

qrt of 9 is + or -3. You cannot assume it is always +3

What is the value of X ?
1) x <> 0
2) x^2 - 9 = 0

Here X^2-9 = 0 means x^2 = 9 or x = +3 or x= -3
one cannot say for sure. However I believe it is safe to assume that the number inside the sqrt sign is +ve
Senior Manager
Joined: 11 Nov 2003
Posts: 355
Location: Illinois
Followers: 1

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

Yes. If x^2 = 9, then that will give us x = +3 or -3

But sqrt(x) = |x| (ALWAYS)
Similar topics Replies Last post
Similar
Topics:
3 A Square Root Has Only One Value 6 17 Jun 2012, 10:56
multiplying sq roots 2 30 Dec 2007, 15:04
SQUARE ROOT 3 22 Jul 2006, 12:07
Squares and Roots 3 26 Apr 2006, 07:27
Square root 4 24 Nov 2005, 15:54
Display posts from previous: Sort by