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

It is currently 23 Oct 2014, 00:42

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If x + y = a and x тАУ y = b, then 2xy

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
avatar
Joined: 07 Jul 2003
Posts: 56
Followers: 2

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

If x + y = a and x тАУ y = b, then 2xy [#permalink] New post 18 Feb 2004, 11:00
If x + y = a and x тАУ y = b, then 2xy =
Senior Manager
Senior Manager
User avatar
Joined: 05 May 2003
Posts: 427
Location: Aus
Followers: 2

Kudos [?]: 5 [0], given: 0

 [#permalink] New post 18 Feb 2004, 12:32
2xy = a power 2 - (x power 2 + y power 2 )
or
2xy = (x power 2 + y power 2) - b power 2
Senior Manager
Senior Manager
User avatar
Joined: 23 Aug 2003
Posts: 462
Location: In the middle of nowhere
Followers: 1

Kudos [?]: 11 [0], given: 0

 [#permalink] New post 18 Feb 2004, 12:49
x + y = a
x тАУ y = b

2x=a+b x=a+b/2
2y = a-b y=a-b/2

2xy =(a+b/2) * (a-b/2)
2xy = 2/4((a+b)*(a-b))

2xy = 1/2(a^2-b^2)


Vivek.
_________________

"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"

Senior Manager
Senior Manager
avatar
Joined: 30 Aug 2003
Posts: 325
Location: dallas , tx
Followers: 1

Kudos [?]: 5 [0], given: 0

 [#permalink] New post 18 Feb 2004, 13:06
I got the same...a^2 -b^2/2
_________________

shubhangi

  [#permalink] 18 Feb 2004, 13:06
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic If x+y=a and x-y=b, then 2xy=? jlgdr 1 06 Oct 2013, 07:43
2 Experts publish their posts in the topic If 2x^2 –y^2 = 2xy, then (x+y)^2= monirjewel 6 11 Nov 2010, 21:38
Experts publish their posts in the topic If 2x^2 - y^2 = 2xy, then (x+y)^2 = bakfed 3 10 May 2010, 16:45
5^k тАУ 5^(k тАУ 1) 5^k skinsvt 1 26 Apr 2007, 07:35
If x+y=a and x-y=b, then 2xy=? a) (a^2 - b^2)/2 b) over13 8 27 Jan 2005, 20:47
Display posts from previous: Sort by

If x + y = a and x тАУ y = b, then 2xy

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.