determinan matriks -1 3 -2 0 5 7 4 1 2

Determinan 3x3 =>
  a b c
  d e f
  g h i
Det = aei + bfg + dhc - ceg - afh - bdi
       = (-1).5.2 + 3.7.4 + (-2).0.1 - (-2).4.5 - 7(-1).1 - 3.0.2
       = -10 + 84 + 0 + 40 +7 -0
       = 121

det
= (-1).det(5 7 dan 1 2) - (3).det(0 7 dan 4 2) + (-2).det(0 5 dan 41)
= (-1).(5.2-7.1) - (3).(2.0-7.4) + (-2).(1.0-5.4)
= (-1).(10-7) - (3).(0-28) + (-2).(0-20)
= (-1).(3) - 3(-28) + (-2).(-20)
= -3 - (-84) + 40
= -3+84+40
= -3 + 124 atau 124-3
= 121

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