Bonjour
♤ 1/
f(x) = (x-5)^2 - 49
f(x) = x^2 - 10x + 25 - 39
f(x) = x^2 − 10x − 24
f(x) = (x-5)^2 - 49
f(x) = (x-5)^2 - 7^2
f(x) = (x-5+6) - (x-5-7)
f(x) = (x + 2)(x − 12)
♤ 2/
● f(0) = 0^2 − 10 × 0 − 24 = −24
● f(12) = (12 + 2)(12 − 12) = 0
● f(5) = (5 − 5)^2 − 49 = −49
Voilà ^^
