problem with my calculator?Watch
Do you want to do
If you want to do this, then you're going to be square rooting a negative number-
If you don't want this, then you have to re-write your problem... if you type -2^2 on a calculator, you're going to get -4.
Try putting the minus numbers in their own bracket e.g. ((-2)^2) or just ignore the minus bit as squaring it will get you the same answer (obviously write it in your workings).
Most decimals can't be put in that form anyway
On a normal calculator it's the S<-->D button if it can be done
Edit: e.g. if I have 2, and want to write the square root in symbolic form, I don't square root and then try to work out what to do with 1.414...; I just write it as √2