berekening van het uitproduct

controle

\begin{array}{l} \left( {\begin{array}{*{20}c} 4\\ 0\\ {-3}\\ \end{array}} \right) \cdot \left( {\begin{array}{*{20}c} 3\\ 2\\ 4\\ \end{array}} \right) = 12 - 12 = 0 \\ \left( {\begin{array}{*{20}c} 0\\ 2\\ {-1}\\ \end{array}} \right) \cdot \left( {\begin{array}{*{20}c} 3\\ 2\\ 4\\ \end{array}} \right) = 4 - 4 = 0 \\ \end{array}

klopt