Ben Bucksch wrote: > Bamm Gabriana wrote: > >> Let a = 1.[...] >> (a + 1)(a - 1) = (a - 1)[...] >> (a + 1) = 1 (cancel common factors) >> 1 + 1 = 1 (substitution.) >> > Troll. (As said, can't devide by 0.) > > It was supposed to be a joke :(
It was a trick I learned in high school (many many years ago) to amuse and confound my classmates and teachers. Of course, the answer is that (a - 1) happens to be zero.
