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

RRB NTPC Mains or Stage 2 Model Paper 5 with solutions

Question : 17 of 120

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(x + y + z = 0),

then what is

(x + y) (y + z) (z + x)

equal to?

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