bonjour
tu mettras niveau collège et non lycée STP
f (x) = - 3 x + 2
f ( 1) = - 3 + 2 = - 1
f ( 0) = 2
f ( - 2 ) = 6 + 2 = 8
- 3 x + 2 = 1
- 3 x = 1 - 2
- 3 x = - 1
x = 1 /3
- 3 x + 2 = 0
- 3 x = - 2
x = 2/3
- 3 x + 2 = - 2
- 3 x = - 2 - 2
- 3 x = - 4
x = 4/3