Compute the Determinant of the Matrix by Cofactor Expansion $$\left[ \begin{array} { l l l } 4 & 2 & 9 \\5 & 2 & 9 \\7 & 7 & 4\end{array} \right]$$

question 8

Multiple Choice

Compute the determinant of the matrix by cofactor expansion.
- $$\left[ \begin{array} { l l l } 4 & 2 & 9 \\5 & 2 & 9 \\7 & 7 & 4\end{array} \right]$$

• A) 55
• B) 891
• C) \(- 197\)
• D) \(- 55\)

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