If possible, find AB. $$A = \left[ \begin{array} { l }
- 5 \
- 1
\end{array} \right] , B = \left[ \begin{array} { c c }
1 & - 2 \
- 6 & 3 \
- 6 & - 5
\end{array} \right]$$
A) $\left[ \begin{array} { c c }
- 5 & 2 \
30 & - 3 \
30 & 5
\end{array} \right]$
B)not possible
C) $\left[ \begin{array} { l l l }
- 7 & 33 & 25
\end{array} \right]$
D) $\left[ \begin{array} { c }
- 3 \
27 \
35
\end{array} \right]$
E) $\left[ \begin{array} { c }
- 7 \
33 \
25
\end{array} \right]$

Question

If possible, find AB. $$A = \left[ \begin{array} { l } 
- 5 \
- 1
\end{array} \right] , B = \left[ \begin{array} { c c } 
1 & - 2 \
- 6 & 3 \
- 6 & - 5
\end{array} \right]$$
A) $\left[ \begin{array} { c c } 
- 5 & 2 \
30 & - 3 \
30 & 5
\end{array} \right]$
B)not possible
C) $\left[ \begin{array} { l l l } 
- 7 & 33 & 25
\end{array} \right]$
D) $\left[ \begin{array} { c } 
- 3 \
27 \
35
\end{array} \right]$
E) $\left[ \begin{array} { c } 
- 7 \
33 \
25
\end{array} \right]$

Quizplus · Accepted Answer

Matrix multiplication is only possible if the number of columns in the first matrix is equal to the number of rows in the second matrix. Matrix A has 1 column and matrix B has 3 rows, so AB is not possible.

If Possible, Find AB A) [−5230−3305]\left[ \begin{array} { c c } - 5 & 2 \\30 & - 3 \\30 & 5\end{array} \right]​−53030​2−35​​

If Possible, Find AB A) $\left[ \begin{array} { c c } - 5 & 2 \\30 & - 3 \\30 & 5\end{array} \right]$