Find the Determinant of the Matrix by the Method of Expansion

question 2

Multiple Choice

Find the determinant of the matrix by the method of expansion by cofactors.Expand using the row 1.​ $$\left[ \begin{array} { c c c } - 3 & 2 & 1 \\4 & 5 & 6 \\2 & - 3 & 1\end{array} \right]$$ ​

• A)-73
• B)75
• C)-75
• D)-74
• E)-76

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