Question

Ршите систему, пожалуйста

Answer 1

${x}^{2} + {y}^{2} = 16 \brace {x}^{2} - y = 4 \\ {y}^{2} + y = 12 \\ {y}^{2} + y - 12 = 0 \\ y_{1} + y_{2} = - 1 \\ y_{1} \times y_{2} = - 12 \\ y_{1} = - 4 \: \: \: \: \: \: \: = > \: \: \: \: \: \: \: x_{1} = 0 \\ y_{2} = 3 \: \: \: \: \: \: \: = > \: \: \: \: \: \: \: x_{2} = \pm \sqrt{7} = \pm2 \sqrt{3}$