Plus/minus square roots?

I've always thought that every positive integer had two square roots,
but then I came across this website that said that the sign of a square
root was dependent on the sign of its corresponding square. So what's
the deal, physicians? Who's right; them or me?

.

Relevant Pages

  • Re: JSH: SF: Simpler factoring idea, but does it work?
    ... Here the square roots mean that expression can't just factor S, ... Including a rigorous proof that it was in fact 100% useless -- although some ... and you need S, and can use any square you like, so it's easiest just ... But does it work beyond toy examples like factoring 15? ...
    (sci.math)
  • Re: Plus/minus square roots?
    ... > I've always thought that every positive integer had two square roots, ... > but then I came across this website that said that the sign of a square ...
    (sci.physics)
  • Re: Plus/minus square roots?
    ... >> I've always thought that every positive integer had two square roots, ... >> but then I came across this website that said that the sign of a square ...
    (sci.physics)
  • Re: JSH: Finally useful theory?
    ... split off the MESS/D part it can factored as (and this is simple enough ... factored innards and square the result. ... So that gives you the factorization of 15. ... You see the ambiguity of the square roots means that TWO factorizations ...
    (sci.math)
  • Re: Plus/minus square roots?
    ... > I've always thought that every positive integer had two square roots, ... > but then I came across this website that said that the sign of a square ... > the deal, physicians? ...
    (sci.physics)