Réponse :
a) f(-2) = 5*(-2) = - 10
f( 1) = 5*1 = 5
f(0) = 5*0 = 0
f(5) = 5*5 = 25
b) g(-3) = (- 3)² = 9
g(-2) = (-2)² = 4
g(0) = 0
g(5) = 5² = 25
Explications étape par étape