GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 19 Oct 2018, 09:26

# Fuqua EA Calls in Progress:

Join us in the chat | track the decision tracker | See forum posts/summary

### 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

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

# If x^2 + 2x − 24 = 24, which of the following is a potential value of

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 50002
If x^2 + 2x − 24 = 24, which of the following is a potential value of  [#permalink]

### Show Tags

13 May 2018, 21:24
00:00

Difficulty:

15% (low)

Question Stats:

79% (00:46) correct 21% (00:59) wrong based on 62 sessions

### HideShow timer Statistics

If x^2 + 2x − 24 = 24, which of the following is a potential value of x?

A. -6
B. 0
C. 4
D. 6
E. 8

_________________
Manager
Joined: 05 Jan 2014
Posts: 53
GMAT 1: 610 Q47 V26
WE: Information Technology (Computer Software)
Re: If x^2 + 2x − 24 = 24, which of the following is a potential value of  [#permalink]

### Show Tags

13 May 2018, 21:36
x^2 + 2x − 48 = 0
x^2 + 8x - 6x - 48 = 0
x*(x+8) -6*(x + 8) = 0
x = -8 or 6
Manager
Joined: 30 Jul 2014
Posts: 137
GPA: 3.72
Re: If x^2 + 2x − 24 = 24, which of the following is a potential value of  [#permalink]

### Show Tags

14 May 2018, 08:04
_________________

A lot needs to be learned from all of you.

Manager
Joined: 01 Aug 2017
Posts: 188
Location: India
Schools: ISB '20 (S), IIMA (S)
GMAT 1: 500 Q47 V15
GPA: 3.4
WE: Information Technology (Computer Software)
Re: If x^2 + 2x − 24 = 24, which of the following is a potential value of  [#permalink]

### Show Tags

14 May 2018, 08:14
Bunuel wrote:
If x^2 + 2x − 24 = 24, which of the following is a potential value of x?

A. -6
B. 0
C. 4
D. 6
E. 8

I have tried an easier way to solve this question.

$$x^2 + 2x − 24 = 24$$

$$x^2 + 2x = 24 + 24$$

x (x+2) = 48.

Substitute each option.
Clearly 6 (6+2) = 48. x =6

Ans - D

Please let me know if I am missing anything.
_________________

If it helps you please press Kudos!

Thank You
Sudhanshu

Board of Directors
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 4094
Location: India
GPA: 3.5
Re: If x^2 + 2x − 24 = 24, which of the following is a potential value of  [#permalink]

### Show Tags

14 May 2018, 08:46
Bunuel wrote:
If x^2 + 2x − 24 = 24, which of the following is a potential value of x?

A. -6
B. 0
C. 4
D. 6
E. 8

$$x^2 + 2x - 48 = 0$$

Or, $$x^2 + x(8 - 6) - 48 = 0$$

Or, $$x^2 + x - 6x - 48 = 0$$

Or, $$x(x + 8) - 6(x + 8)= 0$$

Or, $$(x - 6)(x + 8) = 0$$

Or, x = 6 and x = -8, Thus Answer must be (D)
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

Target Test Prep Representative
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2830
Re: If x^2 + 2x − 24 = 24, which of the following is a potential value of  [#permalink]

### Show Tags

14 Jul 2018, 19:13
Bunuel wrote:
If x^2 + 2x − 24 = 24, which of the following is a potential value of x?

A. -6
B. 0
C. 4
D. 6
E. 8

Simplifying the equation, we have:

x^2 + 2x - 48 = 0

(x + 8)(x - 6) = 0

x = -8 or 6

_________________

Jeffery Miller

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Re: If x^2 + 2x − 24 = 24, which of the following is a potential value of &nbs [#permalink] 14 Jul 2018, 19:13
Display posts from previous: Sort by