Originally Posted by

**evant8950** Hey guys I need to express this matrix as the product as elementary matrices

$\displaystyle

\begin{pmatrix}

1 & 0 & -2 \\

0 & 4 & 3 \\

0 & 0 & 1

\end{pmatrix}

$

I get this answer but the book has a different answer can someone tell me where I went wrong.

$\displaystyle

\begin{pmatrix}

1 & 0 & 0 \\

0 & \frac1{4} & 0 \\

0 & 0 & 1

\end{pmatrix}

\begin{pmatrix}

1 & 0 & 0 \\

0 & 1 & \frac3{4} \\

0 & 0 & 1

\end{pmatrix}

\begin{pmatrix}

1 & 0 & 2 \\

0 & 1 & 0 \\

0 & 0 & 1

\end{pmatrix}

$

Thanks