Find the indicated matrix.
-Let $\mathrm { A } = \left[ \begin{array} { r r r } 6 & - 5 & 5 \ - 3 & - 6 & 5 \end{array} \right]$ and $\mathrm { B } = \left[ \begin{array} { r r r } - 8 & - 1 & 6 \ - 4 & - 8 & 6 \ - 9 & - 3 & - 5 \end{array} \right]$. Find $\mathrm { AB }$
A) $\left[ \begin{array} { r r r } - 48 & 5 & 30 \ 12 & 48 & 30 \ 27 & 18 & - 25 \end{array} \right]$
B) $\left[ \begin{array} { r r r } - 73 & 19 & - 19 \ 3 & 36 & - 79 \end{array} \right]$
C) $\left[ \begin{array} { r r r } 6 & - 5 & 5 \ - 3 & - 6 & 5 \ - 8 & - 6 & 5 \ - 4 & - 8 & 6 \end{array} \right]$
D) $\left[ \begin{array} { r r } - 73 & 3 \ 19 & 36 \ - 19 & - 79 \end{array} \right]$ -9 -9 -5

Question

Quizplus · Accepted Answer

Matrix multiplication of A and B is calculated by taking the dot product of rows of A with columns of B. The correct result is option B, which follows the rules of matrix multiplication.

Find the Indicated Matrix A=[6−55−3−65]\mathrm { A } = \left[ \begin{array} { r r r } 6 & - 5 & 5 \\ - 3 & - 6 & 5 \end{array} \right]A=[6−3​−5−6​55​]

Find the Indicated Matrix $\mathrm { A } = \left[ \begin{array} { r r r } 6 & - 5 & 5 \\ - 3 & - 6 & 5 \end{array} \right]$