If [math]x + y = 2[/math] and [math] x^2 + y^2 = 2[/math], what is the value of [math]xy[/math]? If [math]1\circ4=5[/math] and [math]2\circ5=12[/math] and [math]3\circ6=21[/math] then what is [math]8\circ11[/math]? Fun…