Find the Determinant of the Matrix $\left[ \begin{array} { c c } 7 & 1 \\- 1 & 2\end{array} \right]$

question 246

Multiple Choice

Find the determinant of the matrix. $\left[ \begin{array} { c c } 7 & 1 \\- 1 & 2\end{array} \right]$

• A)15
• B)13
• C) \(- 13\)
• D) \(- \frac { 1 } { 13 }\)
• E) \(- 15\)

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