Question

Помогите с системой уравнений,пожалуйста.Срочно.

Answer 1

$\left \{ {{x^2-2xy+4y^2=7} \atop {x^3+8y^3=35}} \right. \\ \\ \left \{ {{x^2-2xy+4y^2=7} \atop {(x+2y)(x^2-2xy+4y^2)=35}} \right. \\ \\ x+2y=5 \\ \\ x=5-2y \\ \\ (5-2y)^2-2(5-2y)y+4y^2=7 \\ \\ 25-20y+4y^2-10y+y^2+4y^2-7=0 \\ \\ 12y^2-30y+18=0 \\ \\ 2y^2-5y+3=0 \\ \\ D=1 \\ \\ y_{1} =(5+1)/4=1.5 \\ \\ x_{1} =2 \\ \\ y_{2} =1 \\ \\ x_{2} =3 \\ \\ OTVET:(2;1.5) (3;1)$