Solved

Find the Value of the Determinant $\left| \begin{array} { l l } 8 & 5 \\7 & 7\end{array} \right|$

Question 236

Multiple Choice

Find the value of the determinant.
- $\left| \begin{array} { l l } 8 & 5 \\7 & 7\end{array} \right|$

A) 91
B) $- 21$
C) 21
D) $- 9$

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