D
doanhnhanvanhoa


\begin{array}{|} x^3+x-y^3-4y=10 \\ x^2-x+y^2=2 \end{array}
\begin{array}{|} x^3(4y^2+1)+2(x^2+1)\sqrt[2]{x}=6 \\ x^2y(2+2\sqrt[2]{4y^2+1})=x+\sqrt[2]{x^2+1} \end{array}
\begin{array}{|} x^3(4y^2+1)+2(x^2+1)\sqrt[2]{x}=6 \\ x^2y(2+2\sqrt[2]{4y^2+1})=x+\sqrt[2]{x^2+1} \end{array}