posted by Lebogang .
Assuming that the square root of 2 is rational and is = to an even number divided by an odd number.2 multiplied by the odd number squared is= to the even number squared
It is not clear what your question is, but perhaps you are trying to prove that sqrt2 is irrational. If you assume it is a ratio of two integers reduced to lowest terms (and therefore rational), you get a contradiction.
For a proof, see