QuestionQuestion 4
Compute $3 \mathrm{~A}-4 \mathrm{I}_{2}$ using the following matrix, or state that the indicted operation is undefined. $$A=\left[\begin{array}{cc} 10 & 8 \\ -5 & -9 \end{array}\right]$$ $3 A-4 I_{2}$ is undefined $3 A-4 I_{2}=\left[\begin{array}{cc}26 & 20 \\ -19 & -31\end{array}\right]$ $3 A-4 I_{2}=\left[\begin{array}{cc}26 & 24 \\ -15 & -31\end{array}\right]$ $3 A-4 I_{2}=\left[\begin{array}{cc}27 & 24 \\ -15 & -30\end{array}\right]$