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

It is currently 09 Feb 2016, 05:52
GMAT Club Tests

TODAY:

Wharton R2 Interview Invites  |  Join Chat Room for Live Updates


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 + 2x - 8 =

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 05 May 2012
Posts: 16
Followers: 1

Kudos [?]: 14 [0], given: 17

3x^2 + 2x - 8 = [#permalink] New post 13 May 2012, 21:53
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

79% (01:46) correct 21% (00:52) wrong based on 127 sessions
3x^2 + 2x - 8 =

A. (3x-4)(x-2)
B. (3x-4)(x+2)
C. (3x-4)(x-2)
D. (3x-2)(x+4)
E. none of above
[Reveal] Spoiler: OA
Director
Director
User avatar
Status:
Joined: 24 Jul 2011
Posts: 787
GMAT 1: 780 Q51 V48
GRE 1: 1540 Q800 V740
Followers: 99

Kudos [?]: 409 [0], given: 15

Re: 3x^2 + 2x - 8 = [#permalink] New post 13 May 2012, 22:15
3x^2 + 2x - 8
= 3x^2 + 6x - 4x - 8
= 3x (x + 2) - 4 (x+2)
= (3x-4) (x+2)

Option B
_________________

GyanOne | Top MBA Rankings and MBA Admissions Blog

Premium MBA Essay Review|Best MBA Interview Preparation|Exclusive GMAT coaching

Get a FREE Detailed MBA Profile Evaluation | Call us now +91 98998 31738

Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 31287
Followers: 5351

Kudos [?]: 62242 [0], given: 9445

Re: 3x^2 + 2x - 8 = [#permalink] New post 13 May 2012, 23:09
Expert's post
1 KUDOS received
Current Student
User avatar
Joined: 23 Oct 2010
Posts: 386
Location: Azerbaijan
Concentration: Finance
Schools: HEC '15 (A)
GMAT 1: 690 Q47 V38
Followers: 18

Kudos [?]: 240 [1] , given: 73

GMAT ToolKit User
Re: 3x^2 + 2x - 8 = [#permalink] New post 14 May 2012, 00:05
1
This post received
KUDOS
3x^2 + 2x - 8

X1*X2=-8/3
X1+X2=-2/3

Only option B satisfies these parameters
_________________

Happy are those who dream dreams and are ready to pay the price to make them come true

I am still on all gmat forums. msg me if you want to ask me smth

GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 8189
Followers: 416

Kudos [?]: 111 [0], given: 0

Top 10 in overall
Re: 3x^2 + 2x - 8 = [#permalink] New post 05 Jul 2015, 02:49
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

Manager
Manager
User avatar
Joined: 12 Aug 2015
Posts: 236
GMAT 1: 640 Q40 V37
GMAT 2: 650 Q43 V36
Followers: 1

Kudos [?]: 61 [0], given: 1123

CAT Tests
3x^2 + 2x - 8 = [#permalink] New post 21 Jan 2016, 06:11
1. just open the brackets. A is out, B is in. 30 secs.

2. factoring box

a. 3x^2 + 2x - 8 -> mulptiply a and c = 3*-8 = -24
b. factors of -24 that add up to b (i.e. 2) are 6 and -4 (note that the larger factor should be positive because b is positive, one of the factors is negative)
c. arrange the box as below and find common factors in the 2 vertical and 2 horizontal lines. form equation. of (3x-4)(x+2)
Attachments

box.jpg
box.jpg [ 7.22 KiB | Viewed 212 times ]


_________________

KUDO me plenty

3x^2 + 2x - 8 =   [#permalink] 21 Jan 2016, 06:11
    Similar topics Author Replies Last post
Similar
Topics:
1 Experts publish their posts in the topic If 3 - x = 2x - 3, then 4x = Bunuel 4 14 Jan 2014, 00:12
1 Experts publish their posts in the topic If x = -1, then (x^4 - x^3 + x^2)/(x - 1) = Walkabout 3 19 Dec 2012, 05:17
37 Experts publish their posts in the topic If |x| = 3x - 2, then x = ? mave23 20 01 Oct 2011, 18:05
1 If 2x + 5y =8 and 3x = 2y, what is the value of 2x + y? abhi758 2 28 Mar 2010, 08:32
33 Experts publish their posts in the topic What is the solution set for |3x-2|<=|2x-5| GMATMadeeasy 33 16 Jan 2010, 06:00
Display posts from previous: Sort by

3x^2 + 2x - 8 =

  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 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®.