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• ### Essential GMAT Time-Management Hacks

November 14, 2018

November 14, 2018

08:00 PM MST

09:00 PM MST

Join the webinar and learn time-management tactics that will guarantee you answer all questions, in all sections, on time. Save your spot today! Nov. 14th at 7 PM PST
• ### $450 Tuition Credit & Official CAT Packs FREE November 15, 2018 November 15, 2018 10:00 PM MST 11:00 PM MST EMPOWERgmat is giving away the complete Official GMAT Exam Pack collection worth$100 with the 3 Month Pack ($299) # Is x^2 > x? (1) x^2 > 1 (2) x > -1  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics Author Message TAGS: ### Hide Tags Math Expert Joined: 02 Sep 2009 Posts: 50544 Is x^2 > x? (1) x^2 > 1 (2) x > -1 [#permalink] ### Show Tags 04 Dec 2017, 00:04 00:00 Difficulty: 45% (medium) Question Stats: 64% (01:02) correct 36% (00:58) wrong based on 42 sessions ### HideShow timer Statistics Is x^2 > x? (1) x^2 > 1 (2) x > -1 _________________ Intern Joined: 08 Aug 2017 Posts: 11 Re: Is x^2 > x? (1) x^2 > 1 (2) x > -1 [#permalink] ### Show Tags 04 Dec 2017, 00:33 statement 1 is suff. the only interval where x^2<x is when x is between 0 and 1. if x^2>1, this translates to the fact that x is not between 0 and 1. hence, A. Director Joined: 09 Mar 2017 Posts: 516 Location: India Concentration: Marketing, Organizational Behavior WE: Information Technology (Computer Software) Is x^2 > x? (1) x^2 > 1 (2) x > -1 [#permalink] ### Show Tags Updated on: 04 Dec 2017, 04:21 Is x^2 > x? Rephrase question : x(x-1) >0 ? (1)$$x^2$$ > 1 (x - 1)(x + 1)>0 range: (-infinity ,-1) U (1, infinity) Substitute values from this range into the question and check whether we get positive value x= -2 (-2)*(-3) >0 ? ..........yes x=1.5 (1.5*0.5) >0 ? ...........yes Sufficient (2) x > -1 substitute 0.5 (.5)(-.5) >0? ....no substitute -0.5 (-0.5)(-1.5) >0? ...yes two different answers--> not sufficient --A-- _________________ ------------------------------ "Trust the timing of your life" Hit Kudus if this has helped you get closer to your goal, and also to assist others save time. Tq Originally posted by TaN1213 on 04 Dec 2017, 02:15. Last edited by TaN1213 on 04 Dec 2017, 04:21, edited 1 time in total. Intern Joined: 26 Oct 2017 Posts: 27 Re: Is x^2 > x? (1) x^2 > 1 (2) x > -1 [#permalink] ### Show Tags 04 Dec 2017, 04:05 Question ask if the range of x X<0 and x>1 St1: X>1 X<-1 Sufficient St2: X>-1 X=0 (NO) X=4 (YES) Not sufficient Therefore answer is A Sent from my ONEPLUS A3003 using GMAT Club Forum mobile app Manager Joined: 20 Feb 2017 Posts: 166 Location: India Concentration: Operations, Strategy WE: Engineering (Other) Re: Is x^2 > x? (1) x^2 > 1 (2) x > -1 [#permalink] ### Show Tags 04 Dec 2017, 04:24 x^2 > x or x(x-1)>0 or the question is asking is x>1 or x<0 Statement 1 x^2>1 (x-1)(x+1)>0 either x>1 or x<-1 in both the case it is sufficient statement 2 x>-1 not sufficient , since x can be 0 (which doesn't satisfy my equation ) Hence IMO A _________________ If you feel the post helped you then do send me the kudos (damn theya re more valuable than$)

Re: Is x^2 > x? (1) x^2 > 1 (2) x > -1 &nbs [#permalink] 04 Dec 2017, 04:24
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