Solve the Problem $A = \left[ \begin{array} { r r r } - 5 & 4 & 4 \\ 4 & 7 & 8 \\ 5 & - 6 & 3 \end{array} \right]$

question 78

Multiple Choice

Solve the problem.
-Let $A = \left[ \begin{array} { r r r } - 5 & 4 & 4 \\ 4 & 7 & 8 \\ 5 & - 6 & 3 \end{array} \right]$ and $B = \left[ \begin{array} { r r r } 8 & 7 & - 2 \\ - 5 & - 9 & - 8 \\ - 6 & 7 & - 2 \end{array} \right]$ . Find $- 4 A - 3 B$ .

• A)
• \(\left[ \begin{array} { r r r } - 4 & - 37 & - 10 \\ - 1 & - 1 & - 8 \\ - 2 & 3 & - 6 \end{array} \right]\)
• B)
• \(\left[ \begin{array} { r r r } 28 & - 9 & - 18 \\ - 21 & - 37 & - 40 \\ - 26 & 31 & - 14 \end{array} \right]\)
• C)
• \(\left[ \begin{array} { r r r } 3 & 11 & 2 \\ - 1 & - 2 & 0 \\ - 1 & 1 & 1 \end{array} \right]\)
• D)
• \(\left[ \begin{array} { r r r } 3 & - 1 & - 1 \\ 11 & - 2 & 1 \\ 2 & 0 & 1 \end{array} \right]\)

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