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

question 357

Multiple Choice

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

• A) \(- 3\)
• B) 3
• C) 5
• D) 0

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