sapuna wrote:Question : Is k.k + k - 2 > 0 ?

1) k < 1

2) k > -1

sapuna wrote:Question :

Here is what I did:

k.k + k - 2 > 0 ?

(k+2)(k-1) > 0 ?

1) isnt enough because k-1 will always be negative but k+ 2 can be negative , but it can be positive os we don`t know whether k.k + k - 2 > 0 is >0 or < 0

2) since k > - 1 k + 2 and k - 1 will both always be positive so k.k + k - 2 > 0 .So I thought 2 alone is enough,

However,the correct answer is given as C - both statements are needed.

Any thoughts ?

sapuna wrote:Blahh , too much GMAT lately to be honest. Easy question , silly mistake on my part. In statement 2) I was thinking K > 1 in which case the product of the two would always be positive. However, the statement said that K > -1 , in which case the numbers between - 1 and 1 would be a problem. Thank you again. Sorry for wasting your time a bit