1.) x^2 + y^2 = 1 → y^2 = 1-x^2 in 2.) einsetzen
2.) (x - 1)^2 + 2y^2 = 1
(x - 1)^2 + 2*(1-x^2 ) = 1
x^2-2x+1+2-2x^2=1
x^2+2x=2
(x+1)^2=2+1=3
x₁=-1+\( \sqrt{3} \)≈0,732 → x₁^2≈0,535 y^2 = 1-0,535=0,465 →y_1,2=+-0,682
x₂=-1-\( \sqrt{3} \)≈-2,732 → x₂^2≈7,463 y^2 = 1-7,463 Lösungen nicht in ℝ.