Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

OG PS # 32

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Newbie | Next Rank: 10 Posts
Posts: 8
Joined: Wed Jan 12, 2011 6:00 am
by akane » Sun Sep 18, 2011 7:11 am
Can someone better show the simplification breakdown? V(16)(20)+(8)(32) all of that in a sq root (V). In the book the break it down to V(16)(20)+(16)(16) but then they have V(16)(20+16) = V16 V20+16 how is that? what happened to one of the 16? Thx!
Top
Join the discussion
Source: — Problem Solving |
User avatar
Master | Next Rank: 500 Posts
Posts: 158
Joined: Sat Sep 03, 2011 10:31 amFollowed by: 2 members
Thanked: 29 times

by gmatclubmember » Sun Sep 18, 2011 7:31 am
akane wrote:Can someone better show the simplification breakdown? V(16)(20)+(8)(32) all of that in a sq root (V). In the book the break it down to V(16)(20)+(16)(16) but then they have V(16)(20+16) = V16 V20+16 how is that? what happened to one of the 16? Thx!
Here it goes:
Sqrt(16*20+16*16)=sqrt[16(20+16)]=sqrt(16) * sqrt(20+16) = 4*sqrt(36) = 4*6 =24.
Hope this helps...

Cheers
Ami/-
Top
Join the discussion
User avatar
Senior | Next Rank: 100 Posts
Posts: 57
Joined: Fri Apr 09, 2010 11:54 am
Location: India
Thanked: 8 times
GMAT Score:640

by chetansharma » Sun Sep 18, 2011 7:41 am
akane wrote:Can someone better show the simplification breakdown? V(16)(20)+(8)(32) all of that in a sq root (V). In the book the break it down to V(16)(20)+(16)(16) but then they have V(16)(20+16) = V16 V20+16 how is that? what happened to one of the 16? Thx!
Hi akane,
sqrt(a*b) can be expanded as sqrt(a)* sqrt(b) .
In the explanation posted by you, 16 is multiplied in both the terms [in sqrt(16*20 +16*16) as in sqrt(a*b+a*c)] so 16 was taken out as sqrt(16*(20+16)) as in [sqrt(a*(b+c))]. The next step sqrt(16*(20+16) = sqrt(16)*sqrt(20+16) was expanded as per the formula explained in the first line.

Hope this helps!!

Regards,
Chetan
Top
Join the discussion
Newbie | Next Rank: 10 Posts
Posts: 8
Joined: Wed Jan 12, 2011 6:00 am

by akane » Mon Sep 19, 2011 7:33 am
Thx guys! I don't know why I couldn't see it earlier, I knew it was something simple I was missing and it was driving me crazy! I appreciate all the help!
Top
Join the discussion