If $A = \left[ \begin{array} { l l }
3 & 7 \
2 & 4
\end{array} \right]$ and $B = \left[ \begin{array} { c c }
- 3 & 6 \
4 & - 2
\end{array} \right]$ , then find $A - 2 B$ .
A) $\left[ \begin{array} { c c }
1 & 5 \
6 & - 5
\end{array} \right]$
B) $\left[ \begin{array} { c c }
5 & 11 \
- 6 & 8
\end{array} \right]$
C) $\left[ \begin{array} { c c }
9 & - 1 \
- 6 & 8
\end{array} \right]$
D) $\left[ \begin{array} { c c }
9 & - 5 \
- 6 & 8
\end{array} \right]$
E) $\left[ \begin{array} { c c }
- 3 & - 19 \
- 10 & 0
\end{array} \right]$

Question

If $A = \left[ \begin{array} { l l } 
3 & 7 \
2 & 4
\end{array} \right]$ and $B = \left[ \begin{array} { c c } 
- 3 & 6 \
4 & - 2
\end{array} \right]$ , then find $A - 2 B$ .
A) $\left[ \begin{array} { c c } 
1 & 5 \
6 & - 5
\end{array} \right]$
B) $\left[ \begin{array} { c c } 
5 & 11 \
- 6 & 8
\end{array} \right]$
C) $\left[ \begin{array} { c c } 
9 & - 1 \
- 6 & 8
\end{array} \right]$
D) $\left[ \begin{array} { c c } 
9 & - 5 \
- 6 & 8
\end{array} \right]$
E) $\left[ \begin{array} { c c } 
- 3 & - 19 \
- 10 & 0
\end{array} \right]$

Quizplus · Accepted Answer

The Answer of If $A = \left[ \begin{array} { l l } 
3 & 7 \
2 & 4
\end{array} \right]$ and $B = \left[ \begin{array} { c c } 
- 3 & 6 \
4 & - 2
\end{array} \right]$ , then find $A - 2 B$ .
A) $\left[ \begin{array} { c c } 
1 & 5 \
6 & - 5
\end{array} \right]$
B) $\left[ \begin{array} { c c } 
5 & 11 \
- 6 & 8
\end{array} \right]$
C) $\left[ \begin{array} { c c } 
9 & - 1 \
- 6 & 8
\end{array} \right]$
D) $\left[ \begin{array} { c c } 
9 & - 5 \
- 6 & 8
\end{array} \right]$
E) $\left[ \begin{array} { c c } 
- 3 & - 19 \
- 10 & 0
\end{array} \right]$

If A=[3724]A = \left[ \begin{array} { l l } 3 & 7 \\2 & 4\end{array} \right]A=[32​74​]

If $A = \left[ \begin{array} { l l } 3 & 7 \\2 & 4\end{array} \right]$