Question

Cat mai repede!!!
Va rog​.(ex:19)
Dau coroana!!

Answer 1

A×B={(-2,1);(-2,2);(-1,1);(-1,2);(1,1);(1,2)}

B×A={(1,-2);(1,-1);(1,1);(2,-2);(2,-1);(2,1)}

A×A={(-2,-2);(-2,-1);(-2,1);(-1,-2);(-1,-1);(-1,1);(1,-2);(1,-1);(1,1)}

B×B={(1,1);(1,2);(2,1);(2,2)}