BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

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.

★★★★★5.0559 reviews
GMATLiveTeach Starts Oct 17
Chris Peckover, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Chris Peckover, 100th-Percentile GMAT Scorer

Oct 17 · Chris Peckover
Sat · 11:00 AM to 2:00 PM ET
Oct 20 · Chris Peckover
Tue, Thu · 8:00 to 10:00 PM ET
Oct 25 · Josh Braslow
Sun · 1:00 to 4:00 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
EALiveTeachOnDemand 5 seats left Start anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Sun · 9:30 AM to 12:30 PM ET
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
GMATOnDemand Start 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 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Algebra - Quadratic Example

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 67
Joined: Tue Mar 15, 2016 10:35 am
Thanked: 7 times
GMAT Score:410
by diegocml » Thu Apr 07, 2016 8:41 am
Hello guys,

I was wondering if someone could tell me why exactly fact 1 in this DS question is sufficient.

When I came across it, I thought that replacing "x(squared) + 6x" in the question statement to '40' seemed to obvious. What if the question statement stated "x(squared) + 6x = -9" I basically didn't do this move (subtracted 9 from both sides) because I thought it was too easy/good to be true.

What's the value of x(squared) + 6x + 9 ?

Fact 1) x(squared) + 6x = 40
Fact 2) x + 3 = 7

I hope I made my question clear.

Thanks a lot for your help and time.
Cheers,
Diego
Diego

1st GMAT attemp: 410 (Q18 V27)
2nd GMAT attemp: 490 (Q35 V23)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 2135
Joined: Mon Feb 03, 2014 9:26 amFollowed by: 140 members
Location: https://martymurraycoaching.com/
Thanked: 955 times
GMAT Score:800

by MartyMurray » Thu Apr 07, 2016 1:04 pm
diegocml wrote:What's the value of x² + 6x + 9?

(1) x² + 6x = 40

(2) x + 3 = 7
Statement 1:

Given that x² + 6x = 40, we can substitute 40 into the expression from the question.

40 + 9 = 49

Sufficient.

Statement 2:

x² + 6x + 9 = (x + 3)²

Since statement 2 provides the value of x + 3, we can calculate the value of x² + 6x + 9.

Sufficient.

The correct answer is D.
Marty Murray
Perfect Scoring Tutor With Over a Decade of Experience
MartyMurrayCoaching.com
Contact me at [email protected] for a free consultation.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
Elite Legendary Member
Posts: 10392
Joined: Sun Jun 23, 2013 6:38 pmFollowed by: 511 members
Location: Palo Alto, CA
Thanked: 2867 times
GMAT Score:800

by [email protected] » Thu Apr 07, 2016 5:37 pm
Hi Diego,

Certain DS questions really are that simple; one (or both) of the Facts can simply be 'substituted in' to the prompt to answer the given question. Remember that if you're going to define a given Fact as insufficient, then you need proof that there's more than one answer to the given question. If you can't prove that there's more than one answer, then by default you would have to assume that it was sufficient.

GMAT assassins aren't born, they're made,
Rich
Contact Rich at [email protected]
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1