If x + y + z = 0, then what is the value of \(\frac{{{\rm{xy}} + {\rm – McqOptions

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1.	If x + y + z = 0, then what is the value of \(\frac{{{\rm{xy}} + {\rm{yz}} + {\rm{zx}}}}{{{{\rm{x}}^2} + {{\rm{y}}^2} + {{\rm{z}}^2}}}?\)
A.	1
B.	-1
C.	1/2
D.	-1/2
Answer» E.

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