bonjour
Programme A
x
3 x
3 x - 4
Programme B
5 x
5 x + 8
1. on choisit 5
A = 15 - 4 = 11
B = 25 + 8 = 33
2. on choisit - 20
A = - 60 - 4 = - 64
B = - 100 + 8 = - 92
3 x - 4 < 5 x + 8
3 x - 5 x < 8 + 4
- 2 x < 12
x > - 6
] - 6 : + ∞ [
