It is currently 13 Dec 2017, 03:26

Decision(s) Day!:

CHAT Rooms | Ross R1 | Kellogg R1 | Darden R1 | Tepper R1


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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If a*b≠0, and (x−a)(x+b)=0, is b=a?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

1 KUDOS received
Current Student
User avatar
Joined: 03 Feb 2013
Posts: 943

Kudos [?]: 1089 [1], given: 548

Location: India
Concentration: Operations, Strategy
GMAT 1: 760 Q49 V44
GPA: 3.88
WE: Engineering (Computer Software)
Reviews Badge
If a*b≠0, and (x−a)(x+b)=0, is b=a? [#permalink]

Show Tags

New post 05 Nov 2014, 06:22
1
This post received
KUDOS
4
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  75% (hard)

Question Stats:

53% (01:37) correct 47% (01:42) wrong based on 110 sessions

HideShow timer Statistics

If a*b≠0, and (x−a)(x+b)=0, is b=a?

(1) x+a=0

(2) x+b=0
[Reveal] Spoiler: OA

_________________

Thanks,
Kinjal
My Debrief : http://gmatclub.com/forum/hardwork-never-gets-unrewarded-for-ever-189267.html#p1449379
My Application Experience : http://gmatclub.com/forum/hardwork-never-gets-unrewarded-for-ever-189267-40.html#p1516961
Linkedin : https://www.linkedin.com/in/kinjal-das/

Please click on Kudos, if you think the post is helpful

Kudos [?]: 1089 [1], given: 548

1 KUDOS received
Current Student
User avatar
Joined: 03 Feb 2013
Posts: 943

Kudos [?]: 1089 [1], given: 548

Location: India
Concentration: Operations, Strategy
GMAT 1: 760 Q49 V44
GPA: 3.88
WE: Engineering (Computer Software)
Reviews Badge
Re: If a*b≠0, and (x−a)(x+b)=0, is b=a? [#permalink]

Show Tags

New post 05 Nov 2014, 06:25
1
This post received
KUDOS
If a·b≠0, and (x−a)(x+b)=0, is b=a?

(1) x+a=0

(2) x+b=0

Statement 1) x+a = 0
x = -a
and also this statement implies that x+b = 0 [as (x-a) is ≠ 0]
=> -a + b = 0
=> a = b - Sufficient

Statement 2) x+b = 0
=> x = -b
Now (x + a) can be = 0 or can be ≠ 0 -> Insufficient.

Hence A)
_________________

Thanks,
Kinjal
My Debrief : http://gmatclub.com/forum/hardwork-never-gets-unrewarded-for-ever-189267.html#p1449379
My Application Experience : http://gmatclub.com/forum/hardwork-never-gets-unrewarded-for-ever-189267-40.html#p1516961
Linkedin : https://www.linkedin.com/in/kinjal-das/

Please click on Kudos, if you think the post is helpful

Kudos [?]: 1089 [1], given: 548

Expert Post
1 KUDOS received
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 42577

Kudos [?]: 135462 [1], given: 12695

Re: If a*b≠0, and (x−a)(x+b)=0, is b=a? [#permalink]

Show Tags

New post 05 Nov 2014, 06:32
1
This post received
KUDOS
Expert's post
1
This post was
BOOKMARKED

Kudos [?]: 135462 [1], given: 12695

Current Student
User avatar
Joined: 03 Feb 2013
Posts: 943

Kudos [?]: 1089 [0], given: 548

Location: India
Concentration: Operations, Strategy
GMAT 1: 760 Q49 V44
GPA: 3.88
WE: Engineering (Computer Software)
Reviews Badge
Re: If a*b≠0, and (x−a)(x+b)=0, is b=a? [#permalink]

Show Tags

New post 05 Nov 2014, 07:33
Bunuel wrote:
kinjiGC wrote:
If a*b≠0, and (x−a)(x+b)=0, is b=a?

(1) x+a=0

(2) x+b=0


Similar question to practice: if-a-b-0-and-x-a-x-b-0-is-x-a-174779.html


I searched and I didn't get this thread. Thanks for pointing the thread out.
_________________

Thanks,
Kinjal
My Debrief : http://gmatclub.com/forum/hardwork-never-gets-unrewarded-for-ever-189267.html#p1449379
My Application Experience : http://gmatclub.com/forum/hardwork-never-gets-unrewarded-for-ever-189267-40.html#p1516961
Linkedin : https://www.linkedin.com/in/kinjal-das/

Please click on Kudos, if you think the post is helpful

Kudos [?]: 1089 [0], given: 548

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 14877

Kudos [?]: 287 [0], given: 0

Premium Member
Re: If a*b≠0, and (x−a)(x+b)=0, is b=a? [#permalink]

Show Tags

New post 21 Oct 2017, 10:38
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Kudos [?]: 287 [0], given: 0

Re: If a*b≠0, and (x−a)(x+b)=0, is b=a?   [#permalink] 21 Oct 2017, 10:38
Display posts from previous: Sort by

If a*b≠0, and (x−a)(x+b)=0, is b=a?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.