Determinant (3x3) Sarrus' Rule - Matrix to Supplement

Question

Using Sarrus' rule, which shows this matrix supplemented with its first two columns?

$$\left[ {\begin{array} {ccc}  -5 &  -1 &  6 \ 4 &  3 &  9 \ -7 &  8 &  -9 \end{array}  } ight]$$

Accepted Answer

$$\left[ {\begin{array} {ccc}  -5 &  -1 &  6 &  -5 &  -1 \ 4 &  3 &  9 &  4 &  3 \ -7 &  8 &  -9 &  -7 &  8 \end{array}  } ight]$$

Answer

$$\left[ {\begin{array} {ccc}  -5 &  -1 &  6 &  -8 &  -1 \ 4 &  1 &  9 &  4 &  3 \ -7 &  8 &  -9 &  -7 &  8 \end{array}  } ight]$$

Answer

$$\left[ {\begin{array} {ccc}  -5 &  -1 &  6 &  -5 &  -3 \ 4 &  3 &  9 &  4 &  3 \ -5 &  8 &  -9 &  -7 &  8 \end{array}  } ight]$$

Answer

$$\left[ {\begin{array} {ccc}  -5 &  -1 &  6 &  -5 &  -1 \ 4 &  3 &  9 &  4 &  3 \ -9 &  11 &  -9 &  -7 &  8 \end{array}  } ight]$$

Practice: Matrices - Determinant (3x3) Sarrus' Rule - Matrix to Supplement