行列式计算 x y x+y y x+y x x+y x y

=X*(X+Y)*Y+Y*X*(X+Y)+Y*X*(X+Y)-(X+Y)*(X+Y)*(X+Y)-X*X*X-Y*Y*Y
=3XY(X+Y)-(X+Y)^3-X^3-Y^3
=
相信下面的你就晓得做了.
A1 A2 A3
B1 B2 B3
C1 C2 C3
=A1B2C3+A2B3C1+B1C2A3-A3B2C1-A2B1C3-A1B3C2