det(A)= (y+z)2 xy zx xy (x+z)2 yz xz yz (x+y)2=2xyz(x+y+z)3.SHOW THAT
det(A)= (y+z)2 xy zx
xy (x+z)2 yz
xz yz (x+y)2
=2xyz(x+y+z)3.
SHOW THAT