Réponses

2014-09-15T11:34:22+02:00
F(x) = 2x² - 4x - 6

f(x) = 2(x² - 2x - 3)

f(x) = 2(x² - 2x + 1 - 1 - 3)

f(x) = 2 [(x - 1)² - 4]

f(x) = 2(x-1)² - 8