Réponse :
bonjour
x
2 x
2 x + 5
f (x) = 2 x + 5
f ( 6) = 2 *6 + 5 = 12 + 5 = 17
f ( - 3 ) = 2 * -3 + 5 = - 6 + 5 = - 1
continue il suffit de rempalcer x
Explications étape par étape
1) (6x2) + 5 = 12 + 5 = 17
2) (-3)x2 + 5 = -6 + 5 = -1
3) 2x + 5 = 31
2x = 31 - 5 = 26
x =26/2 = 13
4) 2x + 5 = -15
2x = -15 - 5 = -20
x = -20/2 = -10
