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lta2151995
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
=(
)>-Giả sử x,y là các số TM
[TEX]3x^2[/TEX]+[TEX]y^2[/TEX]+2xy-7x-3y+4=0
Tìm GTLN của M=x+y
![Stick Out Tongue :p :p](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![Wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
[TEX]3x^2[/TEX]+[TEX]y^2[/TEX]+2xy-7x-3y+4=0
Tìm GTLN của M=x+y
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