Question

\[\left( \left[\begin{matrix}2 & 4 \\ 6 & 12\end{matrix}\right] \right)\] ......convert this to its echelons form

Answer 1

I think you will get a [[1,1],[0,0]] singular type of matrix

Answer 2

which is not an echelon form of a matrix according to the definitions I have..

Answer 3

http://en.wikipedia.org/wiki/Row_echelon_form