bonjour
x² + 2 x + 7
α = - 2 /2 = - 1
β = ( - 1 )² + 2 * - 1 + 7 = 1 - 2 + 7 = 6
f (x) = ( x + 1 )² + 6
x² - 4 x + 9
α = 4 /2 = 2
β = 2² - 4 * 2 + 9 = 4 - 8 + 9 = 5
= ( x - 2 )² + 5
x² + 6 x + 1
α = - 6 /2 = - 3
β = 9 - 18 + 1 = - 8
= ( x + 3 )² - 8
allez courage fais le dernier
