bantu kerja dong... soal matriks..

Determinan Matriks.

[tex]\displaystyle \mathbf{det}=\begin{vmatrix} -1 &2 &-3 \\ 4 &-5 & 6\\ -7 &8 & -9 \end{vmatrix} \begin{matrix} -1 &2 \\ 4& -5\\ -7&8 \end{matrix}\\[/tex]
-1(-5)(-9) + 2(6)(-7) + (-3)(4)(8) - (-7)(-5)(-3) - 8(6)(-1) - (-9)(4)(2)
= -45 - 84 - 96 + 105 + 48 + 72
= 0