Помогите с решение, пожалуйста

Решите задачу:

$\left \{ {7x^2+3xy+8y^2=6 \hfill} \atop {x^2 + xy + y ^ 2 = 1 \ \ |-*6 \hfill}} \right. \\ \left \{ {x^2 - 3xy + 2 y^2 = 0} \atop {x^2 + xy + y ^ 2 = 1 \hfill}} \right. \left \{ {{ \left [ {{x=y} \atop {x=2y}} \right. \hfill} \atop {x^2 + xy + y ^ 2 = 1 \hfill}} \right. \\ ( 1/\sqrt 3, 1/\sqrt 3) \ \ ( -1/\sqrt 3, -1/\sqrt 3) \ \ (2/\sqrt7, 1/\sqrt7) \ \ (-2/\sqrt7, -1/\sqrt7)$