Find $| A |$ . $A = \left[ \begin{array} { c c }
- 4 & 0 \
0 & 6
\end{array} \right]$

Name: Find $| A |$ . $A = \left[ \begin{array} { c c } - 4 & 0 \\ 0 & 6 \end{array} \right]$
Brand: Quizplus
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Question

Find $| A |$ .​ $A = \left[ \begin{array} { c c } 
- 4 & 0 \
0 & 6
\end{array} \right]$ ​

Quizplus · Accepted Answer

The determinant $| A |$ of a 2x2 matrix $A = \left[ \begin{array} { c c } a & b \ c & d \end{array} \right]$ is calculated as $ad - bc$. For the given matrix, $a = -4$, $b = 0$, $c = 0$, and $d = 6$, so $| A | = (-4)(6) - (0)(0) = -24$.

Find ∣A∣| A |∣A∣ ​ A=[−4006]A = \left[ \begin{array} { c c } - 4 & 0 \\0 & 6\end{array} \right]A=[−40​06​]

Find $| A |$ $A = \left[ \begin{array} { c c } - 4 & 0 \\0 & 6\end{array} \right]$