x+4)^2 > 4 what is the value of x : DS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 19 Jan 2017, 11:31

### 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

# x+4)^2 > 4 what is the value of x

Author Message
Manager
Joined: 16 Apr 2009
Posts: 243
Schools: Ross
Followers: 3

Kudos [?]: 83 [0], given: 10

x+4)^2 > 4 what is the value of x [#permalink]

### Show Tags

07 Jul 2009, 16:04
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

(x+4)^2 > 4

what is the value of x?
_________________

Keep trying no matter how hard it seems, it will get easier.

Senior Manager
Joined: 04 Jun 2008
Posts: 303
Followers: 6

Kudos [?]: 134 [0], given: 15

### Show Tags

07 Jul 2009, 18:15
for (x+4)^2 to be >4, (x+4) must either be < -2 or > 2

when x+4 < -2 ; x < -6
when x+4 > 2 ; x > -2
Manager
Joined: 28 Jan 2004
Posts: 203
Location: India
Followers: 2

Kudos [?]: 27 [0], given: 4

### Show Tags

08 Jul 2009, 20:26
[m]x^2[/m]
As per instructions given to write the formula in a more readable format I tried the following.

Step 1 - I wrote X^2.
Step 2 - I highlighted X^2 and then clicked m given on top. This made it appear as [m]x^2[/m].
Step 3 - I submitted the post.

Result -
As you can see that it did not showed it as a mathematical symbol. Can someone help please. My explanation could have been much simpler had I been able to display the mathematical formula.

Manager
Joined: 28 Jan 2004
Posts: 203
Location: India
Followers: 2

Kudos [?]: 27 [0], given: 4

### Show Tags

08 Jul 2009, 20:48
(x+4)^2 > 4

Make it a equality first.
(x+4)^2 = 4
Solve it we get
(X+2)(X+6) = 0
This means
X = -2 or X = -6.
Now this -2 and -6 are our check points. what we have done is that we have broken the number line into 3 intervals.
(-infiniy,-6) (-6,-2) and (-2,+infinity). we just need to check that within which interval this expression is positive (why positive ? because the initia inequality asked us to find > 4. Had the initial inequaiy asked us to find <4 then we would have find out within which of these 3 interval we have a -ve value).
Now make a grid as follows or use the check point method. I do not recommend check point method so lets go with the grid.

refer my attachment as I do not know how to put a picture here.
Attachments

Inequality.doc [27.5 KiB]

Current Student
Joined: 03 Aug 2006
Posts: 116
Followers: 4

Kudos [?]: 243 [0], given: 3

### Show Tags

08 Jul 2009, 21:17
mdfrahim wrote:
$$x^2$$
As per instructions given to write the formula in a more readable format I tried the following.

Step 1 - I wrote X^2.
Step 2 - I highlighted X^2 and then clicked m given on top. This made it appear as $$x^2$$.
Step 3 - I submitted the post.

Result -
As you can see that it did not showed it as a mathematical symbol. Can someone help please. My explanation could have been much simpler had I been able to display the mathematical formula.

I noticed that you had 'Disable BBCode' checked. Uncheck it and it should work.
Manager
Joined: 28 Jan 2004
Posts: 203
Location: India
Followers: 2

Kudos [?]: 27 [0], given: 4

### Show Tags

08 Jul 2009, 22:36
Can you please tell me how to do this ? I have no idea what a BBCode is !!!!
Current Student
Joined: 03 Aug 2006
Posts: 116
Followers: 4

Kudos [?]: 243 [0], given: 3

### Show Tags

08 Jul 2009, 23:48
mdfrahim wrote:
Can you please tell me how to do this ? I have no idea what a BBCode is !!!!

I have attached a screenshot and if you look under options you will see that you have that flag checked.
Attachments

img1.jpg [ 97.89 KiB | Viewed 541 times ]

Re: Inequality   [#permalink] 08 Jul 2009, 23:48
Display posts from previous: Sort by