Répondre :
bonsoir
1 . n
3n
3n + 10
3 n + 10 + 2 n
= 5 n + 10
R = 5 n + 10
R = 5 ( n + 2 )
2. si n = 3
R = 5 *3 + 10 = 15 + 10 = 25
si n = - 2
R = 5 * -2 + 10 = - 10 + 10 = 0
bonne soirée
bonsoir
1 . n
3n
3n + 10
3 n + 10 + 2 n
= 5 n + 10
R = 5 n + 10
R = 5 ( n + 2 )
2. si n = 3
R = 5 *3 + 10 = 15 + 10 = 25
si n = - 2
R = 5 * -2 + 10 = - 10 + 10 = 0
bonne soirée