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 is 2x1 and Matrix B is 3x2, 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) $\left[ \begin{array} { c c } - 5 & 2 \\30 & - 3 \\30 & 5\end{array} \right]$