Solved

Find the Value of the Determinant $\left| \begin{array} { l l } 1 & - 6 \\8 & - 9\end{array} \right|$

Question 313

Multiple Choice

Find the value of the determinant.
- $\left| \begin{array} { l l } 1 & - 6 \\8 & - 9\end{array} \right|$

A) 66
B) $- 39$
C) $- 57$
D) 39

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