Det(B)
Entwicklung nach der ersten Zeile:
[2i, 2i, 2i;
2, -1, 0;
0, 0, 2i] = 4 + 0 + 0 - 0 - 0 - (-8) = +12
1 * 12 = 12
[0, 2i, 2i;
2i, 2, 0;
2i, 0, 2i] = 0 + 0 + 0 - (-8) - 0 - (-8i) = 8 + 8i
2i * (8 + 8i) = -16 + 16i
Det(B) = 12 - 16 + 16i = -4 + 16i