Ejercicio 5 (J-2004-3 UNED)

Dadas las matrices
$A = \left( \begin{array}{cc} 1 & 0 \\ 2 & 1 \\ -2 & 0 \end{array} \right) \qquad B = \left( \begin{array}{ccc} 2 & 1 & 1 \\ -1 & 0 & 1 \end{array} \right)$
calcula $A \cdot B$