1.

Simplify the following expression. \[x\left( y-z \right)+y\left( z-x \right)+z\left( x-y \right)\]

A.  0 
B.  \[2y\left( z-x \right)~\]
C. \[2x\left( z-y \right)~\]
D.  \[2z\left( x-y \right)~\]
Answer» B.  \[2y\left( z-x \right)~\]


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