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roots and squares question (for kicks)

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Source: — Data Sufficiency |
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by nikhilgmat31 » Mon Jul 13, 2015 11:36 pm
(1) √(x²) = 4
(2) (√x)² = 4

Statement 1 can lead to x = 4 or -4 so not NOT SUFFICIENT.


Statement 2 leads to (√x)² = 4 to x= 4 by cancelling square with square root. since x can't be -4

so x = 4 so SUFFICIENT.


Answer is B
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