Let x / y= xy + x+ y be a binary operation in the set of integers. What is 4 / - 2 ?

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Q: Let x / y= xy + x+ y be a binary operation in the set of integers. Is x / y associative

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Q: What is the set Z of all integers?

A: The set of all integers is, ℤ=........, -4, -3, -2, -1, 0, 1, 2, 3, 4, ........

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