Qui peut m aider svp j arrive pas

bonjour,

exercice 2

-2
-2-3 = -5
-5 * -5 = +25
25/4
25/4 -2 = 25/4 -8/4 = 17/4

7
7-3=4
4-5 =-1
-1/4
-1/4+7 = -1/4 +28/4 = 27/4

x
x-3
-5(x-3)
-5(x-3) /4
-5(x-3) /4 -x