Répondre :
f(x)= -5x + 2
Donc f(2)= -5*2 + 2 = -10 + 2 = -8
Donc f(-3)= -5*(-3) + 2 = 15 + 2 = 17
Donc f(0)= -5*0 + 2 = 0 + 2 = 2
Si f(x) = 13
Alors -5x + 2 = 13
-5x = 13 - 2
-5x = 11
x= -11/5
f(x)= -5x + 2
Donc f(2)= -5*2 + 2 = -10 + 2 = -8
Donc f(-3)= -5*(-3) + 2 = 15 + 2 = 17
Donc f(0)= -5*0 + 2 = 0 + 2 = 2
Si f(x) = 13
Alors -5x + 2 = 13
-5x = 13 - 2
-5x = 11
x= -11/5