$2\cdot A+B=2\cdot \left(\begin{array}{ccc}6& \text{-}1& 3\\ 0& 5& \text{-}4\end{array}\right)+\left(\begin{array}{ccc}4& 0& 1\\ 2& \text{-}2& 5\end{array}\right)=$
$\phantom{2\cdot A+B^T}=\left(\begin{array}{ccc}12& \text{-}2& 6\\ 0& 10& \text{-}8\end{array}\right)+\left(\begin{array}{ccc}4& 0& 1\\ 2& \text{-}2& 5\end{array}\right)=\left(\begin{array}{ccc}16& \text{-}2& 7\\ 2& 8& \text{-}3\end{array}\right)$

Doe dit ook op de GR.