Absolute Values

by **anand_nesan** Mon Oct 06, 2008 2:25 pm

One of the Manhattan GMAT practice test questions (Question name - "Work Your Abs") had this equation

3|x^2 - 4| = y - 2

The answer explanation for this equation came to the following conclusion - "absolute value expression |x^2 - 4| must be greater than or equal to 0."

How can we arrive at this conclusion? Any help is appreciated.

by **anand_nesan** Mon Oct 06, 2008 4:18 pm

Dumb question - never mind folks. I must be smoking something !!

by **RonPurewal** Sat Nov 15, 2008 7:43 am

yeah, that's the definition of an absolute value.

notice, though, that sometimes all that's necessary for you to figure out a problem is to type the problem out!