QuestionSection 9.3 Follow-up Exercises Perform the following matrix operations wherever possible. $$\begin{array}{l} 1-\left(\begin{array}{rr} 4 & -2 \\ 5 & 8 \end{array}\right)-\left(\begin{array}{rr} 3 & 12 \\ 8 & 4 \end{array}\right) \\ 3-3\left(\begin{array}{rr} 4 & -3 \\ -1 & -4 \end{array}\right)+8\left(\begin{array}{rr} 12 & 10 \\ -2 & -4 \end{array}\right) \\ 55\left(\begin{array}{rr} -2 & 10 \\ 8 & 15 \end{array}\right)-3\left(\begin{array}{rr} 20 & -25 \\ -10 & 15 \end{array}\right) \\ 7\left(\begin{array}{ll} 7 & -3 \end{array}\right)\binom{4}{8} \\ 9\left(\begin{array}{ll} 3 & -2 \end{array}\right)\left(\begin{array}{r} 4 \\ -4 \\ -3 \end{array}\right) \end{array}$$ $$\begin{array}{l} 2\left(\begin{array}{cc} 5 & -8 \\ 2 & 14 \end{array}\right)+\left(\begin{array}{rr} -6 & -2 \\ 10 & -4 \end{array}\right)-\left(\begin{array}{rr} -10 & 5 \\ 21 & -8 \end{array}\right) \\ 43 k\left(\begin{array}{cc} -a & b \\ -b & 2 a \end{array}\right)-2 k\left(\begin{array}{ll} a & b \\ b & 2 a \end{array}\right) \\ 6\left(\begin{array}{ll} 7 & 5 \\ 8 & 4 \end{array}\right)-8\left(\begin{array}{ll} 4 & 3 \\ 2 & 4 \end{array}\right)+6\left(\begin{array}{ll} 1 & -8 \\ 2 & -4 \end{array}\right) \\ 8\left(\begin{array}{ll} 1 & -2 \end{array}-3\right)\left(\begin{array}{l} 8 \\ 5 \\ 4 \end{array}\right) \\ 10\left(\begin{array}{lll} 18 & -4 & -6 \end{array}\right)\binom{2}{3} \end{array}$$