If [math]x + y = 2[/math] and [math] x^2 + y^2 = 2[/math], what is the value of [math]xy[/math]?
What are the value of [math]x[/math] and [math]y[/math] in [math]\dfrac{x}{y}+\dfrac{x^2}{y^2}+\dfrac{x^3}{y^3}=14[/math] and [math]x+y=3[/math]?