Giải hệ
Bài 1 $\left\{\begin{matrix}x^2(y+3)(x+2)=\sqrt{2x+3}
& & \\ 4x-4\sqrt{2x+3}+x^3\sqrt{(y+3)^3}+9=0
& &
\end{matrix}\right.$
Bài 2 $\left\{\begin{matrix}y^3+6y^2+16y-3x=-11
& & \\ x^3+3x^2+x-3y=-3
& &
\end{matrix}\right.$
Bài 3 $\left\{\begin{matrix}x^3-8y^3=504
& & \\ 2y^2+x^2+4y-x=18
& &
\end{matrix}\right.$