If [math]x + y = 2[/math] and [math] x^2 + y^2 = 2[/math], what is the value of [math]xy[/math]?
What is the minimum value of [math]x^2 + y^2 -6x - 8y + 26[/math] where P(x,y) satisfies the equation [math]x^2 -xy +2|y| -4 =0?[/math]