bonjour
B (x) = 3 x² + 12 x + 2 α = - b / 2a
α = - 12 / 6 = - 6
β = 3 ( - 6 )² + 12*-6 + 2 = 108 - 72 + 2 = 38
B (x) = 3 ( x + 6 )² + 38
C (x) = - 2 x² + 8 x - 12
α = - 8 / - 4 = 2
β = - 2 ( 2)² + 8*2 - 12 = - 8 + 16 - 12 = - 4
C (x) = - 2 ( x - 2 )² - 4
allez fais le dernier
