sqrt question

[nsg]

(04-09-2017 11:07 PM)Vtile Wrote:  If you make substitution 1=-1 that would mean that whole number line is substituted so 2 turns to -2 and so forth. With only means that the calculus is also mirrored.
How the calculus would go idk (I assume 1*1=-1 and -1*1=1 etc.)

Here, you said it yourself. If you replace 1 with -1 you will get 1*1=-1 and -1*1=1 which is obvious nonsense. Or at least it is not what you have in "usual" algebra. If you replace i with -i, there will be no difference in available identities. Everything that was true in "old" algebra is true in "new" algebra and everything that wasn't, isn't.