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Question

If (x+y+z=0), then what is (x+y)(y+z)(z+x) equal to?

A
xyz
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B
x2+y2+z3
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C
x3+y3+z3+3xyz
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D
xyz
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Solution

The correct option is A xyz
(x+y)(y+z)(z+x)=z×x×y=xyz

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