Find the determinant of the matrix $\left[ \begin{array} { l l }
- 8 & 2 \
- 6 & 4
\end{array} \right]$ .
A) $- 20$
B) $40$
C) $24$
D) $8$
E) $44$

Name: Find the determinant of the matrix $\left[ \begin{array} { l l } - 8 & 2 \\ - 6 & 4 \end{array} \right]$ . A) $- 20$ B) $40$ C) $24$ D) $8$ E) $44$
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Question

Find the determinant of the matrix $\left[ \begin{array} { l l } 
- 8 & 2 \
- 6 & 4
\end{array} \right]$ .
A) $- 20$
B) $40$
C) $24$
D) $8$
E) $44$

Quizplus · Accepted Answer

The determinant of a 2x2 matrix $\left[ \begin{array} { l l } a & b \ c & d \end{array} \right]$ is calculated as $ad - bc$. For the given matrix, this results in $(-8)(4) - (2)(-6) = -32 + 12 = -20$.

Find the Determinant of the Matrix [−82−64]\left[ \begin{array} { l l } - 8 & 2 \\- 6 & 4\end{array} \right][−8−6​24​]

Find the Determinant of the Matrix $\left[ \begin{array} { l l } - 8 & 2 \\- 6 & 4\end{array} \right]$