Perform the indicated operation, whenever possible.
-Let $A = \left[ \begin{array} { r r r } - 4 & 6 & 7 \ 3 & - 5 & 12 \ 7 & - 11 & 14 \end{array} \right]$ and $B = \left[ \begin{array} { r r r } 6 & 10 & - 4 \ - 5 & 6 & - 8 \ 3 & 11 & 7 \end{array} \right]$. Find $A - B$.

A) $\left[ \begin{array} { r r r } - 10 & - 4 & 3 \ - 2 & - 11 & 4 \ 4 & - 22 & 7 \end{array} \right]$

B) $\left[ \begin{array} { r r r } 2 & 16 & 3 \ - 2 & 1 & 4 \ 10 & 0 & 21 \end{array} \right]$

C) $\left[ \begin{array} { r r r } - 10 & - 4 & 11 \ 8 & - 11 & 20 \ 4 & - 22 & 7 \end{array} \right]$

D) $\left[ \begin{array} { c c c } 10 & 4 & - 11 \ - 8 & 11 & - 20 \ - 4 & 22 & - 7 \end{array} \right]$

Question

Perform the indicated operation, whenever possible.
-Let $A = \left[ \begin{array} { r r r } - 4 & 6 & 7 \ 3 & - 5 & 12 \ 7 & - 11 & 14 \end{array} \right]$ and $B = \left[ \begin{array} { r r r } 6 & 10 & - 4 \ - 5 & 6 & - 8 \ 3 & 11 & 7 \end{array} \right]$. Find $A - B$.

A) $\left[ \begin{array} { r r r } - 10 & - 4 & 3 \ - 2 & - 11 & 4 \ 4 & - 22 & 7 \end{array} \right]$

B) $\left[ \begin{array} { r r r } 2 & 16 & 3 \ - 2 & 1 & 4 \ 10 & 0 & 21 \end{array} \right]$

C) $\left[ \begin{array} { r r r } - 10 & - 4 & 11 \ 8 & - 11 & 20 \ 4 & - 22 & 7 \end{array} \right]$

D) $\left[ \begin{array} { c c c } 10 & 4 & - 11 \ - 8 & 11 & - 20 \ - 4 & 22 & - 7 \end{array} \right]$

Quizplus · Accepted Answer

To find $A - B$, subtract each element of $B$ from the corresponding element in $A$. For example, the element in the first row and first column of $A - B$ is $(-4) - 6 = -10$, and so on for each element.

Perform the Indicated Operation, Whenever Possible A=[−4673−5127−1114]A = \left[ \begin{array} { r r r } - 4 & 6 & 7 \\ 3 & - 5 & 12 \\ 7 & - 11 & 14 \end{array} \right]A=​−437​6−5−11​71214​​

Perform the Indicated Operation, Whenever Possible $A = \left[ \begin{array} { r r r } - 4 & 6 & 7 \\ 3 & - 5 & 12 \\ 7 & - 11 & 14 \end{array} \right]$