Giai cac he phuong trinh sau (phuong phap: dua ve nhan tu)
1,$\left\{\begin{matrix} 2x^3+(5+y)x^2+y^2(2x+5)+2y(5x+2)=-y^3-2x\\x^2+y^2+2x+5y+2=0 \end{matrix}\right.$
2,$\left\{\begin{matrix} 2\sqrt{x^2+5x-y+2}-2=\sqrt{y^2+8x}+x\\ 2y-\sqrt{x+3} =x+11 \end{matrix}\right.$