Write the Word or Phrase That Best Completes Each Statement $X=\left[\begin{array}{ll}x & y \\ z & w\end{array}\right]$

Essay

Write the word or phrase that best completes each statement or answers the question
-Using the matrices $X=\left[\begin{array}{ll}x & y \\ z & w\end{array}\right]$ and $L=\left[\begin{array}{cc}1 & m \\ n & o\end{array}\right]$ , verify that $X-L \neq L-X$ (matrix subtraction is not commutative).