Is something like \(\begin{pmatrix} 3 \\ 7 \\ 2 \end{pmatrix} 4 \begin{pmatrix} 6 \\ 5 \\ 2 \end{pmatrix}=4 \begin{pmatrix} 3 \\ 7 \\ 2 \end{pmatrix} \begin{pmatrix} 6 \\ 5 \\ 2 \end{pmatrix}\)true?
to multiply two matrices the number of columns in the leftmost one has to be equal to the number of rows in the rightmost one, so you cant multiply two 3x1 vectors. if you have two square matrices their multiplication usually DOESNT commute
