Find the Indicated Matrix $- 3 ( A - B )$

question 70

Multiple Choice

Find the indicated matrix.
-Find $- 3 ( A - B )$
$A = \left[ \begin{array} { r r r } 1 & 9 & - 7 \\ - 9 & 4 & 3 \end{array} \right]$ and $B = \left[ \begin{array} { r r r } - 2 & 8 & 2 \\ 8 & 4 & - 9 \end{array} \right]$

• A) \(\left[ \begin{array} { r r r } 9 & 3 & - 27 \\ - 51 & 0 & 36 \end{array} \right]\)
• B) \(\left[ \begin{array} { r r r } - 9 & - 3 & 27 \\ 51 & - 0 & - 36 \end{array} \right]\)
• C) \(\left[ \begin{array} { r r r } 3 & 1 & - 9 \\ - 17 & 0 & 12 \end{array} \right]\)
• D) \(\left[ \begin{array} { l l l } 3 & - 51 & 15 \\ 3 & - 24 & 18 \end{array} \right]\)

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