Solved

Find the Value of the Determinant $\left| \begin{array} { r r } - 6 & 9 \\- 7 & - 1\end{array} \right|$

Question 215

Multiple Choice

Find the value of the determinant.
- $\left| \begin{array} { r r } - 6 & 9 \\- 7 & - 1\end{array} \right|$

A) $- 57$
B) $- 69$
C) 69
D) $- 61$

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