Comments

@abecedarian, pedantic as it may be, it would still be the correct way to simplify this equation. From the 7th grade on up through college it was beaten into me that nroots, where n is an even integer, will always have both a positive and negative answer. As I learned this in 7th grade Algebra, it somewhat disheartens me that math teachers would, in a sense, give up and introduce the concept of Principal Square Root instead of teaching the correct concept. I don't know when this concept was introduced, as I have never heard the term until you mentioned it in your reply. Alas, though, the concept is out there and you are just as technically right as I.
As an engineering major this makes me moist