Find the determinant of by the method of expansion by cofactors.

Name: Find the determinant of by the method of expansion by cofactors.
Brand: Quizplus
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Question

Find the determinant of  by the method of expansion by cofactors.

Quizplus · Accepted Answer

Expanding by cofactors along the first row, we have:
$$
\begin{vmatrix}
11ea89fe & 4bd0_e102_9fff_4779212788d5 \
0 & 1
\end{vmatrix}
= (11ea89fe) 	imes
\begin{vmatrix}
1
\end{vmatrix}
- (4bd0_e102_9fff_4779212788d5) 	imes
\begin{vmatrix}
0
\end{vmatrix}
= 11ea89fe.
$$
Therefore, the determinant is 11ea89fe, which corresponds to choice D.

Find the Determinant of by the Method of Expansion