by tommywallach Fri Jun 13, 2014 2:50 pm
Hey Hugo,
Nope. Square roots of NUMBERS only have one solution (the positive solution). Square roots of UNKNOWNS have two solutions (positive and negative). Yep, it's weird, but it's the rules of math.
Rt. 4 = 2
But if Rt. x = 2
then x = positive OR negative 2
-t