Réponses

  • Utilisateur Brainly
2014-10-05T13:32:56+02:00
F(x) = - x² + 4x + 3

α = - b/2a
α = 4/2
α = 2

β = f(α)
β = - 2² + 4 x 2 + 3
β = 4 + 8 + 3
β = 15

f(x) = a(x - α)² + β
f(x) = - 1(x - 2)² + 15