Find the value of the determinant.
-$\left| \begin{array} { c c } - 1 & 1 \ 2 & 3 \end{array} \right|$
A) $- 1$
B) $- 5$
C) 5
D) $- 7$

Name: Find the value of the determinant. -$\left| \begin{array} { c c } - 1 & 1 \\ 2 & 3 \end{array} \right|$ A) $- 1$ B) $- 5$ C) 5 D) $- 7$
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Question

Quizplus · Accepted Answer

The determinant of a 2x2 matrix $\left| \begin{array} { c c } a & b \ c & d \end{array} \right|$ is calculated as $ad - bc$. For this matrix, it is $(-1)(3) - (1)(2) = -3 - 2 = -5$.

Find the Value of the Determinant ∣−1123∣\left| \begin{array} { c c } - 1 & 1 \\ 2 & 3 \end{array} \right|​−12​13​​

Find the Value of the Determinant $\left| \begin{array} { c c } - 1 & 1 \\ 2 & 3 \end{array} \right|$