Question
Without expanding the determinants show that (x+y+z) is a factor of :
|x-y-z 2x 2x|
|2y y-z-x 2y|
|2z 2zz-x-y|
Without expanding the determinants show that (x+y+z) is a factor of :
|x-y-z 2x 2x|
|2y y-z-x 2y|
|2z 2zz-x-y|
