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tony11b5
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
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[tex]\left{\begin{x^2+y+x^3y+xy^2+xy=\frac{-5}{4}\\x^4+y^2+xy(1+2x)=\frac{-5}{4}[/tex]
[tex]\left{\begin{x^2+y+x^3y+xy^2+xy=\frac{-5}{4}\\x^4+y^2+xy(1+2x)=\frac{-5}{4}[/tex]
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