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

 It is currently 03 May 2015, 07:09

### 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 x is positive, is x > 3 ? (1) (x - 1)^2 > 4 (2) (x

Author Message
TAGS:
Intern
Joined: 22 Jul 2008
Posts: 10
Followers: 0

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

If x is positive, is x > 3 ? (1) (x - 1)^2 > 4 (2) (x [#permalink]  18 Aug 2008, 19:44
If x is positive, is x > 3 ?

(1) (x - 1)^2 > 4
(2) (x - 2)^2 > 9

I thought
1) x>0 or x>3
2) x>5 or x>-1 so E, but OA is D. Could anyone explain? Thanks!
Director
Joined: 12 Jul 2008
Posts: 518
Schools: Wharton
Followers: 16

Kudos [?]: 118 [0], given: 0

Re: GMATPREP- inequality [#permalink]  18 Aug 2008, 20:09
flygmat wrote:
If x is positive, is x > 3 ?

(1) (x - 1)^2 > 4
(2) (x - 2)^2 > 9

I thought
1) x>0 or x>3
2) x>5 or x>-1 so E, but OA is D. Could anyone explain? Thanks!

(1) Sufficient

For positive x:
(x-1)^2 > 4
x-1 > 2
x > 3

(2) Sufficient

For positive x:
(x-2)^2 > 9
x-2 > 3
x > 5
SVP
Joined: 07 Nov 2007
Posts: 1828
Location: New York
Followers: 29

Kudos [?]: 541 [0], given: 5

Re: GMATPREP- inequality [#permalink]  18 Aug 2008, 20:12
flygmat wrote:
If x is positive, is x > 3 ?

(1) (x - 1)^2 > 4
(2) (x - 2)^2 > 9

I thought
1) x>0 or x>3
2) x>5 or x>-1 so E, but OA is D. Could anyone explain? Thanks!

(1) (x - 1)^2 > 4

(x - 1)^2 - 2^2>0
(x-1-2) (x-1+2)>0
(x-3)(x+1)>0

x>3
and x>-1 (X is positive.. so this solution is not feasible)

Sufficient
(2) (x - 2)^2 > 9
(x-5)(x+1)>0
x>5 ---sufficient
and x>-1 (X is positive.. so this solution is not feasible)
_________________

Smiling wins more friends than frowning

Intern
Joined: 22 Jul 2008
Posts: 10
Followers: 0

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

Re: GMATPREP- inequality [#permalink]  19 Aug 2008, 17:22
x2suresh wrote:
flygmat wrote:
If x is positive, is x > 3 ?

(1) (x - 1)^2 > 4
(2) (x - 2)^2 > 9

I thought
1) x>0 or x>3
2) x>5 or x>-1 so E, but OA is D. Could anyone explain? Thanks!

(1) (x - 1)^2 > 4

(x - 1)^2 - 2^2>0
(x-1-2) (x-1+2)>0
(x-3)(x+1)>0

x>3
and x>-1 (X is positive.. so this solution is not feasible)

Sufficient
(2) (x - 2)^2 > 9
(x-5)(x+1)>0
x>5 ---sufficient
and x>-1 (X is positive.. so this solution is not feasible)

I absolutely missed that X is positive! Geez.. Thanks you all!
Re: GMATPREP- inequality   [#permalink] 19 Aug 2008, 17:22
Similar topics Replies Last post
Similar
Topics:
If x is postive, is x>3? 1) (x-1)^2 > 4 2) (x- 2)^2 1 26 Dec 2008, 12:56
If x is positive, is x >3? 1. (x-1)^2 > 4 2. (x-2)^2 4 24 Dec 2008, 03:12
If x is positive, is x > 3 ? (1) (x-1)^2 > 4 8 06 Oct 2008, 22:35
If x is positive, is x > 3? 1) (x-1)^2 > 4 2) (x-2)^2 8 07 May 2008, 15:06
If x is positive, is x > 3? 1) (x-1)^2 > 4 2) (x-2)^2 8 27 Apr 2008, 14:46
Display posts from previous: Sort by