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Source: — Data Sufficiency |
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by StarDust845 » Sun Jan 06, 2008 4:50 pm
Stem: |x+2| = 4, implies x+2 = 4 or x+2 = -4, which inturn implies x = 2 or -6.

From I, x = -6. Hence answer is A or D
From II, x = -6.

Hence answer is D.
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by magical cook » Sun Jan 06, 2008 4:59 pm
thanks,

1) is def sufficient

but for 2) x^2 = 36 is +/- 6, so I was not sure if it's okay to say suff for the answewr -6..
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by StarDust845 » Sun Jan 06, 2008 5:03 pm
Good question. I believe it is sufficient because:

Given in stem: x = 2 or -6.

From II we get x = 6 or -6. When I combine this info with what it given in stem, I get a unique value of x.

Calista.
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by magical cook » Sun Jan 06, 2008 5:07 pm
thanks for clear out my doubt... :)
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