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Nov30-08, 02:32 PM
HW Helper
P: 3,562
Quote Quote by Mark44 View Post
I hope this is the way you used to do things, but don't do them that way now! Your equation [tex]\sqrt{-1}^2=-1[/tex] is incorrect on at least two counts:
  1. [tex]-1^2=-1[/tex], so you're attempting to take the square root of -1. If you meant the square of -1, rather than the negative of 1 squared, put parentheses around -1.
  2. [tex]\sqrt{(-1)^2}=+1, not -1[/tex]
well I meant [tex](\sqrt{-1})^2[/tex]. Of course when I see i2 I instantly think -1, and don't get into the nitty gritty of it