H
hoabinh01
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
Giai va bien luan he phuong trinh:
{x+y=1
{x^2+Y^2\leqa ( su dung phuong phap hinh hoc ket hop voi dai so)
{x+y=1
{x^2+Y^2\leqa ( su dung phuong phap hinh hoc ket hop voi dai so)
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