GRE Reading Comprehension Butler – get 2 RC’s to Practice Every Day
close

It is currently 17 Jun 2019, 21:52
Search
Register
My Tests
New posts
Unanswered

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.

Go to My Workbook Learn more

x2 – 49 = 0

  Question banks Downloads My Bookmarks Reviews Important topics  
 
Search for:
 
Print view
First unread post
Author Message
TAGS:
GRE Prep Club Legend
GRE Prep Club Legend
User avatar
Joined: 07 Jun 2014
Posts: 4810
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 117

Kudos [?]: 1895 [0], given: 397

x2 – 49 = 0 [#permalink] New post 15 Apr 2018, 04:07
Expert's post
00:00

Question Stats:

72% (00:38) correct 27% (01:06) wrong based on 18 sessions
\(x^2 - 49 = 0\)
Quantity A
Quantity B
\(x^2 - 7x\)
\(-7x+49\)


A. Quantity A is greater.
B. Quantity B is greater.
C. The two quantities are equal.
D. The relationship cannot be determined from the information given.

Drill 2
Question: 3
Page: 510
[Reveal] Spoiler: OA

_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

1 KUDOS received
Director
Director
User avatar
Joined: 07 Jan 2018
Posts: 644
Followers: 7

Kudos [?]: 601 [1] , given: 88

Re: x2 – 49 = 0 [#permalink] New post 17 Apr 2018, 02:12
1
This post received
KUDOS
From the eqn \(x^2 = 49\)
therefore, \(x = 7, -7\)

when \(x\) is replaced by either \(7\) or \(-7\) the two quantities are equal
When \(x = 7\) both quantities are \(0\)
when \(x = -7\) both quantities are \(98\)
_________________

This is my response to the question and may be incorrect. Feel free to rectify any mistakes

1 KUDOS received
Manager
Manager
Joined: 26 Jan 2018
Posts: 186
Followers: 0

Kudos [?]: 115 [1] , given: 3

Re: x2 – 49 = 0 [#permalink] New post 17 Apr 2018, 02:59
1
This post received
KUDOS
x can be eithr +7 or -7. In options A and B, the term including x are both -7x, and the other term has same value.

x^2 or 49, both are same.

Hence both A and B are equal.
GRE Prep Club Legend
GRE Prep Club Legend
User avatar
Joined: 07 Jun 2014
Posts: 4810
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 117

Kudos [?]: 1895 [0], given: 397

Re: x2 – 49 = 0 [#permalink] New post 18 Apr 2018, 15:43
Expert's post
Explanation

Remember that when a variable is squared, it yields a positive and a negative solution; hence, \(x^2 - 49 = 0\) means that \(x^2 = 49\) and x = ± 7.

If x = 7, then both quantities are equal to zero. If x = –7, then both quantities are equal to 98. The answer is choice (C).
_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Intern
Intern
Joined: 03 Mar 2015
Posts: 14
Followers: 0

Kudos [?]: 12 [0], given: 2

Re: x2 – 49 = 0 [#permalink] New post 18 Apr 2018, 19:31
We get x^2 = 49 from the given condition.

Qty A is x^2 - 7x which is nothing but 49 -7x
Qty B is -7x + 49 which I can write as 49 -7x

Observe both the quantities now!

What do you see??

Both are same!!!
_________________

Press Kudos if you find the post useful :)

Regards
Ambarish
GMAT/GRE/SAT trainer
My Reviews: https://www.urbanpro.com/bangalore/amba ... ws/7229395
Message/Whatsapp: +91-9686497804

Intern
Intern
Joined: 15 May 2018
Posts: 38
Followers: 0

Kudos [?]: 5 [0], given: 1

Re: x2 – 49 = 0 [#permalink] New post 09 Jul 2018, 18:43
sandy wrote:
\(x^2 - 49 = 0\)
Quantity A
Quantity B
\(x^2 - 7x\)
\(-7x+49\)


A. Quantity A is greater.
B. Quantity B is greater.
C. The two quantities are equal.
D. The relationship cannot be determined from the information given.

Drill 2
Question: 3
Page: 510

My Answer is C
Intern
Intern
User avatar
Joined: 04 May 2017
Posts: 36
Followers: 0

Kudos [?]: 26 [0], given: 6

Re: x2 – 49 = 0 [#permalink] New post 10 Jul 2018, 08:32
x^2=49 -> x=7 or x=-7. In either case, QA=QB -> C.
_________________

Do not pray for an easy life, pray for the strength to endure a difficult one - Bruce Lee

Re: x2 – 49 = 0   [#permalink] 10 Jul 2018, 08:32
Display posts from previous: Sort by

x2 – 49 = 0

  Question banks Downloads My Bookmarks Reviews Important topics  
Print view
First unread post

Moderators: GreenlightTestPrep, IlCreatore, pranab01, Moderators

Search for:


cron

GRE Prep Club Forum Home| About| Terms and Conditions and Privacy Policy| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.

Main navigation

Partners

GRE Resources

www.ets.org/gre