Prove that
(a) |ax by cz|    | a   b   c |                         (b) |1    a     a2-bc|
     |x2  y2  z2| = | x   y   z |                               |1     b     b2-ca| = 0
​     | 1   1   1|    | yz  zx xy|                              |1     c     c2-ab|
 

This question has not been answered yet!
What are you looking for?