Réponse:
f(2) = 2² -3×2 +1 = -1
f(√3) = (√3)² -3(√3) +1 = 4 -3√3
f(2+√3) = (2+√3)² -3(2+√3) +1 = 2+√3
f(1+h) = (1+h)² -3(1+h) +1 = 1+2h+h² -3-3h +1
f(1+h) = h² -h -2
