Даны матрицы: [tex] A= \left[\begin{array}{ccc}1&2&3\\-1&3&5\\0&5&1\end{array}ight] [/tex] и [tex] B= \left[\begin{array}{ccc}2&3&1\\1&5&4\\-1&7&8\end{array}ight] [/tex]
Найти: 1) A+B; 2)A*B