Science Forums 2

[sanctus]

Have you already noticed that


Thing is that for half an hour I searched which of the two reasoponings is wrong:

1)

Since -1*-1=+1

2)

Since i^2=-1

It took me as already said more than 3 min to figure it out, hope to you it isn't obvious at first read why both versions are right (and incomplete)...just so that I don't feel too stupid