Stuart, if I understand correctly can I simply add an absolute sign around the value of the square root to avoid confusing myself;Stuart Kovinsky wrote: First thing we need to understand: by mathematical convention, the phrase "square root of" or the square root symbol are translated as "the positive square root of".
e.g. can I think of statement 1 as follows :
sq root(x^4)=9-> |x^2| = 9 -> x^2 = 9 or x^2 = -9.
thanks.
