Quote by Mark44 I hope this is the way you used to do things, but don't do them that way now! Your equation $$\sqrt{-1}^2=-1$$ is incorrect on at least two counts:$$-1^2=-1$$, 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. $$\sqrt{(-1)^2}=+1, not -1$$
well I meant $$(\sqrt{-1})^2$$. Of course when I see i2 I instantly think -1, and don't get into the nitty gritty of it