Vectors and matrices › Determinants › Cofactor expansion

Determinant of a 3x3 matrix

High school · ●●○○○ 20 pts

Find the value of the determinant ∣671921391314812426∣\left|\begin{array}{ccc} 67 & 19 & 21 \\ 39 & 13 & 14 \\ 81 & 24 & 26 \end{array}\right|.

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