bonsoir
1. 25 x + 5
5. - 3 ( 6 x² - 10 x + 3 x - 5 ) = - 3 ( 6 x² - 7 x - 5 ) = - 18 x² + 21 x + 15
2. - 6 x² + 14 x
6. 12 ( x² + 3 x - 2 x - 6 ) = 12 ( x² + x- 6 ) = 12 x² + 12 x - 72
3. 2 x² - x + 6 x = 2 x² + 5 x
7 . 10 x + x² - 16
4. - 5 x + 4 x² - 25 + 20 x = 4 x² + 15 x - 25
8. 6 ( 4 x² + 4 x + 1 ) = 24 x² + 24 x + 6