B
bboy114crew
Giải hệ phương trình :
[tex] \left\{\begin{array}{l}x^3 + y^3 - xy^2 = 1\\4x^4 + y^4 = 4x + y\end{array}\right. [/tex]
[tex] \left\{\begin{array}{l}x^3 + y^3 - xy^2 = 1\\4x^4 + y^4 = 4x + y\end{array}\right. [/tex]