Solved

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

Question 33

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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