![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
X3 – 2x2 + x – 3y2
Tính :
-
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Tính :
![C:\DOCUME~1\DONGTI~1\LOCALS~1\Temp\msohtmlclip1\01\clip_image002.png](https://diendan.hocmai.vn/file:///C:\DOCUME~1\DONGTI~1\LOCALS~1\Temp\msohtmlclip1\01\clip_image002.png)
![C:\DOCUME~1\DONGTI~1\LOCALS~1\Temp\msohtmlclip1\01\clip_image004.png](https://diendan.hocmai.vn/file:///C:\DOCUME~1\DONGTI~1\LOCALS~1\Temp\msohtmlclip1\01\clip_image004.png)
ast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast'>