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

Question

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

Quizplus · Accepted Answer

To find $A - B$, subtract each element of matrix $B$ from the corresponding element in matrix $A$. The correct subtraction results in the matrix given in option E.

Find a - B A) [10−70−5−5968]\left[ \begin{array} { c c c } 1 & 0 & - 7 \\0 & - 5 & - 5 \\9 & 6 & 8\end{array} \right]​109​0−56​−7−58​​

Find a - B A) $\left[ \begin{array} { c c c } 1 & 0 & - 7 \\0 & - 5 & - 5 \\9 & 6 & 8\end{array} \right]$