I tried answering the last example and my answer is 2x³-6x+21 remainder 56 Is it correct? Edit: I learned the correct way to solve this and the answer is 2x³+6x-3 remainder 18x-2
My Math teacher is like that but 24/7. It's at least slightly entertaining if it's done once like that, but my math teacher says something like this at least twice a day...