1.

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

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


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