Difficult prep

by **Dilip** Mon Sep 22, 2008 12:40 pm

If X<0, Then ((-x)Modulus x)1/2

Ans:-x

Can any1 solve this for me

Thanks In advace

by **RonPurewal** Mon Oct 13, 2008 7:29 am

what are the other answer choices?

is this a gmatprep problem? if so, you NEED to post the problem in its entirety, including answer choices.

in brief:
because x is negative, |x| is equal to -x (which is positive).

therefore, -x|x| = (-x)(-x), or x^2.

so the square root of this expression is |x|, which happens to be -x (because x is negative).

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you could solve this problem fairly easily by plugging in numbers, if the answer choices are anything like what i think they're like.