Page 95 - Mathématiques RAC1 volume 1 2020

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9. (2x + 3) – (2x – 3) =
2
2

10. 121 + (2x – 11) (2x + 11) =

11. (x + 1) (x – 7) (8 – 2x) =

12. (x – 8) (x + 12) =

–1 
13. z (2z )   z =
3
 2 

2 – 3 
14. x y   y =
2
3  4 

15. 12 – (– 8y + 7y – 3y) =

16. 3x – 2x – [4x – (5x – 8x)] =

17. (14x + 5y) – (9x – 5y – 3z) =

18. (15x + 3y – z) + (–14x + 2y + z) =

19. 15x – [5x – (2x – y)] =

20. – x (2x + 5x – x ) =
2
3
2
21. – 2xz (3x – 5z + 1) =
2
2

22. (– 4xz – 5x z) (– xz ) =
3
3
3

ES Nyon-Marens BAMV ed 2020 maths Rac2