Welcome! Check out our free B-School Guides to learn how you compare with other applicants.
Login or Register
 

Help Kaplan 800

This topic has 1 member reply
Bookmark
Previous Topic Next Topic
kwhite Just gettin' started! Default Avatar
Joined
23 Dec 2011
Posted:
13 messages
Help Kaplan 800 Post Sat Feb 25, 2012 12:51 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    I posted this in the DS forum but i wasn't sure if anyone would see it there so ill leave this here as well if thats ok

    What is the value of a - b?

    1) a^2 - b^2 = 9

    2) a^2 - 2ab + b^2 = 1

    [Moderator Edit: Moved the post to a relevant forum - neelgandham]

    I am really stumped and the book explanation isn't helping me at all. Going off of #1 a^2 - b^2 = 9 --> (a-b)(a+b)=9 Therefore:

    can't we take (a-b) = 9?? or is my factoring just really off tonight??

    thank you for your help.

    OA = E

    Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
    sanju09 GMAT Instructor
    Joined
    21 Jan 2009
    Posted:
    3262 messages
    Followed by:
    48 members
    Thanked:
    190 times
    GMAT Score:
    760
    Post Sat Feb 25, 2012 5:45 am
    kwhite wrote:
    I posted this in the DS forum but i wasn't sure if anyone would see it there so ill leave this here as well if thats ok

    What is the value of a - b?

    1) a^2 - b^2 = 9

    2) a^2 - 2ab + b^2 = 1



    I am really stumped and the book explanation isn't helping me at all. Going off of #1 a^2 - b^2 = 9 --> (a-b)(a+b)=9 Therefore:

    can't we take (a-b) = 9?? or is my factoring just really off tonight??

    thank you for your help.

    OA = E
    I am chasing, don't worry...

    http://www.beatthegmat.com/help-kaplan-800-t106976.html

    _________________
    The laws of nature are but the mathematical thoughts of God. ~Euclid

    Best Conversation Starters
    1 varun289 42 topics
    2 greenwich 25 topics
    3 guerrero 20 topics
    4 sana.noor 19 topics
    5 killerdrummer 19 topics
    See More Top Beat The GMAT Members...

    Most Active Experts
    1 image description Brent@GMATPrepNow

    GMAT Prep Now Teacher

    		 196 posts
    2 image description GMATGuruNY

    The Princeton Review Teacher

    		 143 posts
    3 image description Anju@Gurome

    Gurome

    		 121 posts
    4 image description Jim@StratusPrep

    Stratus Prep

    		 86 posts
    5 image description David@VeritasPrep

    Veritas Prep

    		 41 posts
    See More Top Beat The GMAT Experts