Bonsoir
♧ On a donc :
f(x) --> Déjà factoriser √
g(x) = (x-5)² - 5
g(x) = (x-5)² - (√5)²
g(x) = (x-5-√5)(x-5+√5)
h(x) = (x+4)² - 2
h(x) = (x+4)² - (√2)²
h(x) = (x+4-√2)(x+4+√2)
i(x) = (x+1)² - 1/4
i(x) = (x+1)² - (1/2)²
i(x) = (x+1-1/2)(x+1+1/2)
i(x) = (x-1/2)(x+3/2)
Voilà ^^
