Find all School-related info fast with the new School-Specific MBA Forum

It is currently 26 Jul 2014, 07:21

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

[3x^2(x-2)-x+2]/(x-2)=?

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Current Student
avatar
Joined: 28 Dec 2004
Posts: 3405
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 150 [0], given: 2

GMAT Tests User
[3x^2(x-2)-x+2]/(x-2)=? [#permalink] New post 24 Jul 2005, 07:57
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Please show your working....

[3x^2(x-2)-x+2]/(x-2)=?
Director
Director
avatar
Joined: 27 Dec 2004
Posts: 910
Followers: 1

Kudos [?]: 10 [0], given: 0

GMAT Tests User
 [#permalink] New post 24 Jul 2005, 08:23
Freshina, do you have the answer choices to this question?

I got 3x^2 - 1 (using polynomial division)

3x^3 - 6x^2 - x + 2 /x-2 = 3x^2 - 1
Current Student
avatar
Joined: 28 Dec 2004
Posts: 3405
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 150 [0], given: 2

GMAT Tests User
 [#permalink] New post 24 Jul 2005, 09:18
I do...but I dont want to give em..cause..people start guessing...I want to see the workings...
Senior Manager
Senior Manager
avatar
Joined: 30 May 2005
Posts: 283
Followers: 1

Kudos [?]: 3 [0], given: 0

GMAT Tests User
Re: PS...actual gmat exam question... [#permalink] New post 24 Jul 2005, 09:45
fresinha12 wrote:
from a past GMAT exam...

Please show your working....

[3x^2(x-2)-x+2]/(x-2)=?


[3x^2(x-2)-x+2]/(x-2)=
factor x-2

3x^2(x-2)-(x-2)/(x-2)=

(x-2)(3x^2-1)/(x-2)
CANCEL OUT ( x-2)

hence left (3x^2-1) =0

3x^2=1
x^2=1/3
X = +OR -SQ ROOT 1/3 :) hope it is right
Director
Director
avatar
Joined: 27 Dec 2004
Posts: 910
Followers: 1

Kudos [?]: 10 [0], given: 0

GMAT Tests User
 [#permalink] New post 24 Jul 2005, 09:50
[3x^2(x-2)-x+2]/(x-2)=?

3x^2 (x-2) –x + 2
3x^3 – 6x^2 – x + 2
divided by
X – 2

X out of 3x^3 = 3x^2
3x^2 * x – 2 = 3x^3 + 6x^2
(3x^3 – 6x^2 – x + 2) – (3x^3 + 6x^2) =
-x + 2
-x + 2 divided by x = -1
-1 * x – 2 = -x + 2
(-x + 2) – (-x + 2) = 0

So ans is 3x^2 - 1
Senior Manager
Senior Manager
avatar
Joined: 17 Apr 2005
Posts: 377
Location: India
Followers: 1

Kudos [?]: 13 [0], given: 0

GMAT Tests User
Re: PS...actual gmat exam question... [#permalink] New post 25 Jul 2005, 10:20
mandy wrote:



hence left (3x^2-1) =0



Mandy, how did you equate the LHS to 0.

HMTG.
Director
Director
avatar
Joined: 05 Jan 2005
Posts: 562
Followers: 2

Kudos [?]: 10 [0], given: 0

GMAT Tests User
 [#permalink] New post 26 Jul 2005, 11:26
Folaa3 wrote:
Freshina, do you have the answer choices to this question?

I got 3x^2 - 1 (using polynomial division)

3x^3 - 6x^2 - x + 2 /x-2 = 3x^2 - 1


I agree with fola.
Mandy: It's not an eqn. but a polynomial, so you can't assume 3X^2 - 1 to be equal to zero.
VP
VP
avatar
Joined: 18 Nov 2004
Posts: 1447
Followers: 2

Kudos [?]: 15 [0], given: 0

GMAT Tests User
 [#permalink] New post 26 Jul 2005, 11:46
Folaa3 wrote:
[3x^2(x-2)-x+2]/(x-2)=?

3x^2 (x-2) –x + 2
3x^3 – 6x^2 – x + 2
divided by
X – 2

X out of 3x^3 = 3x^2
3x^2 * x – 2 = 3x^3 + 6x^2
(3x^3 – 6x^2 – x + 2) – (3x^3 + 6x^2) =
-x + 2
-x + 2 divided by x = -1
-1 * x – 2 = -x + 2
(-x + 2) – (-x + 2) = 0

So ans is 3x^2 - 1


Very long method. Mandy's approach is best except that LHS shudn't be equated to 0 and the ans shud be left as 3x^2-1
Senior Manager
Senior Manager
avatar
Joined: 29 Nov 2004
Posts: 486
Location: Chicago
Followers: 1

Kudos [?]: 4 [0], given: 0

GMAT Tests User
 [#permalink] New post 26 Jul 2005, 19:34
so is 3x^2-1 the answer or is there any numerical answer
_________________

Fear Mediocrity, Respect Ignorance

Senior Manager
Senior Manager
avatar
Joined: 30 May 2005
Posts: 283
Followers: 1

Kudos [?]: 3 [0], given: 0

GMAT Tests User
Re: PS...actual gmat exam question... [#permalink] New post 27 Jul 2005, 00:39
HowManyToGo wrote:
mandy wrote:



hence left (3x^2-1) =0



Mandy, how did you equate the LHS to 0.


HMTG.


PLZ what is the LHS


my logic was get the x
I had left this : 3x^2 -1
since there is only one unknow i can still solve it
so 3x^2 -1=O
3x^2=1
SO x^2=1/3
Hence + OR - SQUARE root of 1/3
i try to get the most simplified form of x
i might be wrong PLZ Let me know

thanks :)
VP
VP
avatar
Joined: 18 Nov 2004
Posts: 1447
Followers: 2

Kudos [?]: 15 [0], given: 0

GMAT Tests User
 [#permalink] New post 27 Jul 2005, 15:00
Mandy: That's wrong, there can't be any numerical ans to this. Ans shud be left as 3x^2 -1. You can't just equate 3x^2 -1 = 0 unless otherwise indicated.
Manager
Manager
avatar
Joined: 06 Aug 2005
Posts: 198
Followers: 3

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

GMAT Tests User
 [#permalink] New post 06 Aug 2005, 21:52
What if x=2 and the denominator is 0 !

So it is only (3x^2-1) if x <> 2

otherwise you have to keep the (x-2)s in.
SVP
SVP
avatar
Joined: 14 Dec 2004
Posts: 1711
Followers: 1

Kudos [?]: 29 [0], given: 0

GMAT Tests User
 [#permalink] New post 07 Aug 2005, 04:40
[3x^2(x-2)-x+2]/(x-2)=?

Steps...
= [3x^2(x-2)-(x-2)]/(x-2)

= [(x-2) (3x^2-1)]/(x-2)

= 3x^2-1.

(This is true only if 'x' is not equal to '2')
SVP
SVP
User avatar
Joined: 03 Jan 2005
Posts: 2255
Followers: 12

Kudos [?]: 189 [0], given: 0

GMAT Tests User
RE: [3x^2(x-2)-x+2]/(x-2)=? [#permalink] New post 09 Aug 2005, 21:00
This is basic algebra, you should make sure you feel it to be very easy.

[3x^2(x-2)-x+2]/(x-2)
=[3x^2(x-2)-(x-2)]/(x-2)
=[(x-2)(3x^2-1)]/(x-2)
=3x^2-1

(x would not be equal to 2 by definition, because the original function already have (x-2) in the denominator.)
_________________

Keep on asking, and it will be given you;
keep on seeking, and you will find;
keep on knocking, and it will be opened to you.

RE: [3x^2(x-2)-x+2]/(x-2)=?   [#permalink] 09 Aug 2005, 21:00
    Similar topics Author Replies Last post
Similar
Topics:
2 Experts publish their posts in the topic If x#2, then (3x^2(x-2)-x+2)/(x-2)= Bunuel 6 06 Mar 2014, 02:03
Experts publish their posts in the topic If x≠2, then [3x^2(x-2)-x+2]/(x-2)= Stiv 2 14 Jul 2012, 00:36
6 Experts publish their posts in the topic If x≠2, then [3x^2(x-2)-x+2]/(x-2)= Lolaergasheva 8 07 Mar 2011, 06:14
1 If x is not equal to 2, then 3x^2(x-2)-x+2/(x-2) = a) shils01 8 07 Mar 2008, 08:09
If x≠2, then (3x^2)(x-2)-x+2 / (x-2) equals (A) bmwhype2 2 09 Jun 2007, 20:09
Display posts from previous: Sort by

[3x^2(x-2)-x+2]/(x-2)=?

  Question banks Downloads My Bookmarks Reviews Important topics  


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

Powered by phpBB © phpBB Group and phpBB SEO

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®.