Now if, well, certainly there's a lot more complicated things in complex numbers, you should, all you really done, is to, this thing about the complex  you get them work out some algebra, you go out and Z square  some algebra and then you've done the complex  with some algebra and with the use of plus and minus signs in there, it's a little bit tricky, but nothing, that, that, at A level that you shouldn't be able to handle, right, and once you've got that you look for some new , just, working  and the least, and deciding what happened when you've actually got .