Compute the determinant of the matrix by cofactor expansion.
-$$\left[ \begin{array} { r r r }
1 & 2 & 5 \
4 & 8 & 12 \
- 2 & 3 & - 1
\end{array} \right]$$
A) 14
B) 56
C) $- 28$
D) 28

Question

Compute the determinant of the matrix by cofactor expansion.
-$$\left[ \begin{array} { r r r } 
1 & 2 & 5 \
4 & 8 & 12 \
- 2 & 3 & - 1
\end{array} \right]$$
A) 14
B) 56
C) $- 28$
D) 28

Quizplus · Accepted Answer

The Answer of Compute the determinant of the matrix by cofactor expansion.
-$$\left[ \begin{array} { r r r } 
1 & 2 & 5 \
4 & 8 & 12 \
- 2 & 3 & - 1
\end{array} \right]$$
A) 14
B) 56
C) $- 28$
D) 28

Compute the Determinant of the Matrix by Cofactor Expansion [1254812−23−1]\left[ \begin{array} { r r r } 1 & 2 & 5 \\4 & 8 & 12 \\- 2 & 3 & - 1\end{array} \right]​14−2​283​512−1​​

Compute the Determinant of the Matrix by Cofactor Expansion $\left[ \begin{array} { r r r } 1 & 2 & 5 \\4 & 8 & 12 \\- 2 & 3 & - 1\end{array} \right]$