In GMAT, is sqrt(x) always +ve ?
This can get really tricky in some DS questions depending on
the equations, example if we simplify equation and use x instead of
sqrt(x) and consider positive/negative numbers - could get
a wrong answer.
Any suggestions for a clean way to handle this topic is appreciated.
There are many posts that discussed this issue in details.
Try finding some of them and go through them. They would, I believe, clear your doubt.