1 2 3 41 0 1 23 -1 -1 01 2 0 -5c1-c3,c4-2c3-2 2 3 -2 0 0 1 0 4 -1 -1 2 1 2 0 -5按第2行展开, D = (-1)^(2+3)*-2 2 -2 4 -1 2 1 2 -5c2+c1,c3-c1-2 0 0 4 3 -2 1 3 -6D = 2* (-18 + 6) = -24.