Perform the indicated elementary row operations.
-$$\begin{array} { l }
( - 3 ) \mathrm { R } _ { 1 } \
{ \left[ \begin{array} { r r }
5 & 3 \
7 & - 6
\end{array} \right] }
\end{array}$$
A)
$\left[ \begin{array} { r r } - 15 & - 9 \ 7 & - 6 \end{array} \right]$
B)
$\left[ \begin{array} { r r } 15 & 9 \ 7 & - 6 \end{array} \right]$
C)
$\left[ \begin{array} { l l } - 15 & - 9 \ - 21 & 18 \end{array} \right]$
D)
$\left[ \begin{array} { r r } 5 & 3 \ - 21 & 18 \end{array} \right]$

Question

Perform the indicated elementary row operations.
-$$\begin{array} { l } 
( - 3 ) \mathrm { R } _ { 1 } \
{ \left[ \begin{array} { r r } 
5 & 3 \
7 & - 6
\end{array} \right] }
\end{array}$$
A)
$\left[ \begin{array} { r r } - 15 & - 9 \ 7 & - 6 \end{array} \right]$
B)
$\left[ \begin{array} { r r } 15 & 9 \ 7 & - 6 \end{array} \right]$
C)
$\left[ \begin{array} { l l } - 15 & - 9 \ - 21 & 18 \end{array} \right]$
D)
$\left[ \begin{array} { r r } 5 & 3 \ - 21 & 18 \end{array} \right]$

Quizplus · Accepted Answer

Multiplying the first row by -3 results in the first row becoming $[-15, -9]$, while the second row remains unchanged.

Perform the Indicated Elementary Row Operations (−3)R1[537−6]\begin{array} { l } ( - 3 ) \mathrm { R } _ { 1 } \\{ \left[ \begin{array} { r r } 5 & 3 \\7 & - 6\end{array} \right] }\end{array}(−3)R1​[57​3−6​]​

Perform the Indicated Elementary Row Operations $\begin{array} { l } ( - 3 ) \mathrm { R } _ { 1 } \\{ \left[ \begin{array} { r r } 5 & 3 \\7 & - 6\end{array} \right] }\end{array}$