We have,
$\mathrm{A}={\left[\begin{array}{cc}\sqrt{3}& 1\\ 2& 3\end{array}\right]}_{2\times 2}$ and $\mathrm{B}={\left[\begin{array}{ccc}\mathrm{x}& \mathrm{y}& \mathrm{z}\\ \mathrm{a}& \mathrm{b}& \mathrm{c}\end{array}\right]}_{2\times 3}$
Here, A and B are of different Orders. Also, we know that the addition of two matrices A and B is possible only if order of both the matrices A and B should be same.Hence, the sum of matrices A and B is not possible.