Question

sendo A={-2, -1, 0, 1 }e B={3, 8, 9}, determine A×B B×A

Answer 1

A={-2, -1, 0, 1 }e B={3, 8, 9}, determine A×B B×A
A×B={(-2,3);(-1,3);(0,3);(1,3);(-2,8);(-1,8);(0,8);(1,8);(-2,9);(-1,9);(0,9);(1,9)}
B×A={(3,-2);(8,-2);(9,-2);(3,-1);(8,-1);(9,-1);(3,0);(8,0);(9,0);(3,1);(8,1);(9,1)}