It is currently 21 Jan 2018, 02:58

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# If = 3, which of the following could be the value of x – 4?

Author Message
Manager
Joined: 11 Aug 2009
Posts: 121

Kudos [?]: 196 [0], given: 3

If = 3, which of the following could be the value of x – 4? [#permalink]

### Show Tags

18 Nov 2009, 20:38
1
This post was
BOOKMARKED
00:00

Difficulty:

45% (medium)

Question Stats:

69% (00:38) correct 31% (00:32) wrong based on 77 sessions

### HideShow timer Statistics

If $$\sqrt{(x+4)^2} = 3$$, which of the following could be the value of $$x-4$$?

A. -11
B. -7
C. -4
D. -3
E. 5

OPEN DISCUSSION OF THIS QUESTION IS HERE: https://gmatclub.com/forum/if-x-4-2-1-2 ... 43886.html
[Reveal] Spoiler: OA

Last edited by Bunuel on 25 Dec 2017, 21:56, edited 3 times in total.

Kudos [?]: 196 [0], given: 3

Manager
Joined: 28 Jul 2009
Posts: 121

Kudos [?]: 38 [0], given: 12

Re: If = 3, which of the following could be the value of x – 4? [#permalink]

### Show Tags

18 Nov 2009, 21:40
The question seems to be incomplete. What is equal to 3?

Kudos [?]: 38 [0], given: 12

Manager
Joined: 11 Aug 2009
Posts: 121

Kudos [?]: 196 [0], given: 3

Re: If = 3, which of the following could be the value of x – 4? [#permalink]

### Show Tags

19 Nov 2009, 05:29
Acc3ss wrote:
The question seems to be incomplete. What is equal to 3?

sorry, just edited it. ^^

Kudos [?]: 196 [0], given: 3

Manager
Joined: 13 Aug 2009
Posts: 198

Kudos [?]: 131 [0], given: 16

Schools: Sloan '14 (S)
Re: If = 3, which of the following could be the value of x – 4? [#permalink]

### Show Tags

19 Nov 2009, 07:47
No worries kairoshan,

\sqrt{((x+4)^2)}=3

Then
x+4=-3 OR x+4=3
x=-7 or -1

-7-4=-11
-1-5=-5

What is the OA?

Kudos [?]: 131 [0], given: 16

Intern
Joined: 22 Sep 2009
Posts: 35

Kudos [?]: 27 [0], given: 3

Re: If = 3, which of the following could be the value of x – 4? [#permalink]

### Show Tags

20 Nov 2009, 06:32
the given expression reduces to
(x+4)^2 - 3^2=0
(x+4+3)(x+4-3)=0
(x-4+11)(x-4+5)=0
x-4=-11 or -5
Ans. A

Kudos [?]: 27 [0], given: 3

TOEFL Forum Moderator
Joined: 16 Nov 2010
Posts: 1588

Kudos [?]: 619 [0], given: 42

Location: United States (IN)
Concentration: Strategy, Technology
Re: If = 3, which of the following could be the value of x – 4? [#permalink]

### Show Tags

13 May 2011, 04:30
x = -7

=> x-4 = -11

_________________

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)

GMAT Club Premium Membership - big benefits and savings

Kudos [?]: 619 [0], given: 42

Manager
Status: GMAT in 4 weeks
Joined: 28 Mar 2010
Posts: 176

Kudos [?]: 198 [0], given: 25

GPA: 3.89
Re: If = 3, which of the following could be the value of x – 4? [#permalink]

### Show Tags

13 May 2011, 12:03
Square root of a square is +ve or -ve.

But it is given that Square of a square has +ve value

then how can x+4 = -3 ?????
_________________

If you liked my post, please consider a Kudos for me. Thanks!

Kudos [?]: 198 [0], given: 25

Director
Joined: 01 Feb 2011
Posts: 703

Kudos [?]: 153 [0], given: 42

Re: If = 3, which of the following could be the value of x – 4? [#permalink]

### Show Tags

13 May 2011, 19:43
x =-1 or -7

=>x-4 can be -5 or -11

Kudos [?]: 153 [0], given: 42

Intern
Joined: 15 Apr 2011
Posts: 6

Kudos [?]: 2 [0], given: 1

Re: If = 3, which of the following could be the value of x – 4? [#permalink]

### Show Tags

16 May 2011, 10:33
The equation reduces to:
(x+4)^2 = 3^2

So taking the square root on the RHS we get:
x+4 = +/- 3

Now there are 2 possible values:
x+ 4 = 3 and x+4 = -3

You can directly subtract 8 from both the equations to get the answer:
x-4 = (3-8) and x-4 = (-3-8)

Therefore (x-4) has possible values -5 and -11.

Kudos [?]: 2 [0], given: 1

Manager
Joined: 30 Dec 2015
Posts: 90

Kudos [?]: 25 [0], given: 153

GPA: 3.92
WE: Engineering (Aerospace and Defense)
Re: If = 3, which of the following could be the value of x – 4? [#permalink]

### Show Tags

08 Oct 2016, 13:26
kairoshan wrote:
If $$\sqrt{(x+4)^2} = 3$$, which of the following could be the value of $$x-4$$?

A. -11
B. -7
C. -4
D. -3
E. 5

$$(X+4)^2 = 9$$

$$(X-4+8)^2 = 9$$
let X-4 = A
$$(A+8)^2 = 9$$
Now, sub answer choices in A
A) $$(-11+8)^2 = (-3)^2 = 9$$
_________________

If you analyze enough data, you can predict the future.....its calculating probability, nothing more!

Kudos [?]: 25 [0], given: 153

Math Expert
Joined: 02 Sep 2009
Posts: 43348

Kudos [?]: 139643 [0], given: 12794

Re: If = 3, which of the following could be the value of x – 4? [#permalink]

### Show Tags

25 Dec 2017, 21:56
If $$\sqrt{(x+4)^2} = 3$$, which of the following could be the value of x - 4?

A. -11
B. -7
C. -4
D. -3
E. 5

$$\sqrt{(x+4)^2} = 3$$ --> $$(x+4)^2=9$$ --> $$x+4=3$$ or $$x+4=-3$$ --> $$x=-1$$ or $$x=-7$$ --> $$x-4=-5$$ or $$x-4=-11$$.

OPEN DISCUSSION OF THIS QUESTION IS HERE: https://gmatclub.com/forum/if-x-4-2-1-2 ... 43886.html
_________________

Kudos [?]: 139643 [0], given: 12794

Re: If = 3, which of the following could be the value of x – 4?   [#permalink] 25 Dec 2017, 21:56
Display posts from previous: Sort by