(October 25, 2016 at 7:48 am)Vic Wrote: Yeah, you need to assume that x=/=0 to divide by x.
And while we're at it, always remember that x^2 always has two solutions. Otherwise math teachers everywhere get mini heart attacks.
True (aside from 0, that is). On a related note, this includes non-real numbers as well. So another tip: don't forget the negative square roots of negative numbers when solving something like x^2 = -1.
