Answer
Column 3-vectors:
$\begin{bmatrix}
1 \\ -1 \\ 2 \end{bmatrix}$ and $\begin{bmatrix}
3 \\ -2 \\ 6 \end{bmatrix}$ and $\begin{bmatrix}
-4 \\ 5 \\ 7 \end{bmatrix}$
Row 3-vectors:
$\begin{bmatrix}
1 & 3 & -4 \end{bmatrix}$ and $\begin{bmatrix}
-1 & -2 & 5 \end{bmatrix}$ and $\begin{bmatrix}
2 & 6 & 7 \end{bmatrix}$
Work Step by Step
Column vectors
With $j=1$
$\begin{bmatrix}
a_{11} \\ a_{21} \\ a_{31}\end{bmatrix}=\begin{bmatrix}
1 \\ -1 \\ 2 \end{bmatrix}$
With $j=2$
$\begin{bmatrix}
a_{12} \\ a_{22} \\ a_{32}\end{bmatrix}=\begin{bmatrix}
3 \\ -2 \\ 6 \end{bmatrix}$
With $j=3$
$\begin{bmatrix}
a_{13} \\ a_{23} \\ a_{33}\end{bmatrix}=\begin{bmatrix}
-4 \\ 5 \\ 7 \end{bmatrix}$
Row vectors
With $i=1$
$\begin{bmatrix}
a_{11} & a_{12} & a_{13}\end{bmatrix}=\begin{bmatrix}
1 & 3 & -4 \end{bmatrix}$
With $i=2$
$\begin{bmatrix}
a_{21} & a_{22} & a_{23}\end{bmatrix}=\begin{bmatrix}
-1 & -2 & 5 \end{bmatrix}$
With $i=3$
$\begin{bmatrix}
a_{31} & a_{32} & a_{33}\end{bmatrix}=\begin{bmatrix}
2 & 6 & 7 \end{bmatrix}$
