Find the indicated sum or difference, if it is defined.
-$$\left[ \begin{array} { l l }
- 1 & - 6 \
- 1 & - 8 \
- 6 & - 5
\end{array} \right] + \left[ \begin{array} { r r }
6 & 3 \
- 2 & - 2 \
- 5 & - 6
\end{array} \right]$$
A) $\left[ \begin{array} { r r } 5 & - 3 \ - 3 & - 10 \ - 11 & - 11 \end{array} \right]$
B) $\left[ \begin{array} { r r } - 7 & - 9 \ 1 & - 6 \ - 1 & - 12 \end{array} \right]$
C) $\left[ \begin{array} { r r } 5 & - 8 \ - 3 & - 10 \ - 11 & - 11 \end{array} \right]$
D) not defined

Question

Find the indicated sum or difference, if it is defined.
-$$\left[ \begin{array} { l l } 
- 1 & - 6 \
- 1 & - 8 \
- 6 & - 5
\end{array} \right] + \left[ \begin{array} { r r } 
6 & 3 \
- 2 & - 2 \
- 5 & - 6
\end{array} \right]$$
A) $\left[ \begin{array} { r r } 5 & - 3 \ - 3 & - 10 \ - 11 & - 11 \end{array} \right]$
B) $\left[ \begin{array} { r r } - 7 & - 9 \ 1 & - 6 \ - 1 & - 12 \end{array} \right]$
C) $\left[ \begin{array} { r r } 5 & - 8 \ - 3 & - 10 \ - 11 & - 11 \end{array} \right]$
D) not defined

Quizplus · Accepted Answer

To find the sum of two matrices, add corresponding elements from each matrix. For the given matrices, the sum is calculated as follows: $(-1+6, -6+3$, $(-1-2, -8-2$, $(-6-5, -5-6$), resulting in $\left[ \begin{array} { r r } 5 & -3 \ -3 & -10 \ -11 & -11 \end{array} \right]$.

Find the Indicated Sum or Difference, If It Is Defined