bonjour,
1/96 = 0.010416....
( x + 4 ) ( x - 1 ) = 0
x = - 4 ou 1
3 ) 3 n + 2 = 6 n - 1
3 n - 6 n = - 1 - 2
- 3 n = - 3
n = 1
4) 3 x - 7 = - 4
3 x = - 4 + 7
3 x = 3
x = 1
5) forme factorisée
6 ) f (x) = 4 x² + 6 x + 7
f ( - 2 ) = 4 ( - 2)² + 6 *- 2 + 7 = 16 - 12 + 7 = 11