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The Cartesian product A xx A has 9 eleme...

The Cartesian product `A xx A` has 9 elements among which are found (-1,0) and (0,1). Find the set A and the remaining elements of `A xx A`

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`A=-{1,0,1}`, the remaining elements of `A xx A` are `(-1,-1), (-1,1),(0,-1),(0,0)` `(1,-1),(1,0),(1,1)`
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