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

question 21

Multiple Choice

Find the value of the determinant.
- $$\left| \begin{array} { r r } 3 & - 1 \\- 1 & 2\end{array} \right|$$

• A) -1
• B) 5
• C) -5
• D) 7

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