Помогите пожалуйста.

Решите задачу:

$\left \{ {{x^{2}-y^{2}=8}|*2 \atop {3x^{2}+2y^{2}=29}} \right. \\\\+\left \{ {{2x^{2}-2y^{2}=16} \atop {3x^{2}+2y^{2}=29}} \right. \\--------\\5x^{2} =45\\\\x^{2}=9\\\\x_{1} =3\\\\x_{2} =-3\\\\y^{2}=x^{2}-8=9-8=1\\\\y_{1}=1\\\\y_{2}=-1\\\\1)\left \{ {{x=3} \atop {y=1}} \right.\\\\2)\left \{ {{x=3} \atop {y=-1}} \right.\\\\3)\left \{ {{x=-3} \atop {y=1}} \right.\\\\4)\left \{ {{x=-3} \atop {y=-1}} \right.$