If the cartesian product A × A has 16 elements among which a few elements are found to be (-1, 0), (0, 1), (1, 2), then find set A.
{-1, 0, 1, 2}
Since A × A has 16 elements
So, A should have 4 elements
Four distinct elements in A is {-1, 0, 1, 2}
Therefore, set A = {-1, 0, 1, 2}