j'ai vraiment besoin d'aide !! ​

-6 - 2 = -8

-8 * (-6+3)

-8 * -3 = 24

24 + 6 = 30

30 -6²

30 - 36 = -6

4/7 - 2/1 = 4/7 - 14/7 = -10/7

-10/7 * (4/7 +3/1) = -10/7 * (4/7 +21/7) = -10/7 * 25/7

-10/7 * 25/7 = -250/49

-250/49 + 6/1 = -250/49 + 294/49 = -44/49

-44/49 - 4/7*4/7 = -44/49 - 16/49 = 28/49  = 4/7

soit x le nombre de départ

x =  (x -2)*(x+3) + 6 -x²

x = x² - x² + 3x  - 2x -6 + 6

x = x