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DS - Modulus Question

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f2001290: Master | Next Rank: 500 Posts; Posts: 400; Joined: Sat Mar 10, 2007 4:04 amFollowed by: 1 member; Thanked: 1 times

by f2001290 » Wed Jun 13, 2007 8:54 am

Q7:
What is the value of │x + 7│?
(1) │x + 3│= 14
(2) (x + 2)^2 = 169

OA is D. I hope somebody disagrees with it.

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Source: Beat The GMAT — Data Sufficiency | Wed Jun 13, 2007 8:54 am

drhomler: Master | Next Rank: 500 Posts; Posts: 141; Joined: Thu May 03, 2007 1:15 pm

by drhomler » Wed Jun 13, 2007 12:58 pm

Q7:
What is the value of │x + 7│?
(1) │x + 3│= 14
(2) (x + 2)^2 = 169

From statement 1) x could be 11 or -17 not suff
From statement 2) (x+2)*(x+2)=169 x could be 11 or -15 not suff
Putting the two together x=11 the way I learned this is that if an answer overlaps in the two no need to go back to make sure it works.

So C

I dont see how it could be D each statement gives two possible answers unless something stated X is a pos. integer. Am I missing something?

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