Question

sec 1.2 problem 29

Answer 1

can you post either the problem or a link to the problem?

Answer 2

You mean problem on page 21?I am using international edition...so I am not sure

Answer 3

If it is right, the answer is:
\[zx+xy+yz=0.5*((x+y+z)^2-x^2-y^2-z^2)\] and \[x+y+z=0\]
so \[zx+xy+yz=-0.5(x^2+y^2+z^2)\]