SOLUTION: why does a negative sign have to be in front of a square root to make it true....

Algebra ->  Square-cubic-other-roots -> SOLUTION: why does a negative sign have to be in front of a square root to make it true....      Log On


   

Question 381154: why does a negative sign have to be in front of a square root to make it true....
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
minus times a minus equals a plus
plus times a plus equals a plus
so it has to be identified to be true