Matrici.
Cum se rezolva exercitiile de genul asta
Sa se determine matricele A si B, daca:
a) 2A+B=[tex] \left[\begin{array}{ccc}1&0\\-1&3\end{array}\right] [/tex] ,
3A-2B=[tex] \left[\begin{array}{ccc}5&7\\9&-1\end{array}\right] [/tex]

b)2A+3B= [tex] \left[\begin{array}{ccc}-8&-7&2\\-1&6&-5\end{array}\right] [/tex] ,
A-2B=[tex] \left[\begin{array}{ccc}3&0&1\\3&-4&1\end{array}\right] [/tex]