var x,y:real;begin write('x\y':8); y:=-2; while y<2.1 do </span> begin write(y:8:4); y:=y+0.2; end; writeln; x:=-1; while x<1.1 do </span>begin write(x:8:4); y:=-2; while y<2.1 do </span>begin write((2*x*y-2*x*y):8:4); y:=y+0.2; end; x:=x+0.1; writeln; end;end.