Question

Решите систему уравнений: x^2+y=5, 5x+y=5

Answer 1

$\left \{ {{x^2+y=5} \atop {5x+y=5}} \right.-\ \textgreater \ \left \{ {{x^2+y=5} \atop {y=5-5x}} \right. -\ \textgreater \ x^2+5-5x=5-\ \textgreater \ x=0,x=5 \\ \\ y=5-5*0 \\ y=5-5*5 \\ \\ y=5 \\ y=-20 \\ \\ (x1;y1)=(0;5) \\ (x2;y2)=(5;-20)$