1.4.8 Matrix transformations

Condition: Find a linear combination of the given matrices: \[ 3 B-A \] \[ A=\left(\begin{array}{ccc} 4 & -2 & 1 \\ 3 & 1 & -2 \\ 2 & 0 & 3 \end{array}\right), \quad B=\left(\begin{array}{ccc} 3 & 5 & 4 \\ 5 & -1 & -2 \\ 6 & 2 & 1 \end{array}\right) \]