Soit la focntion f definie par f(x)=x²-8x+7

1.Montrer que f(x)=(x-4)²-9

2.En deduire uen formule factorisée de f(x)

3.utiliser la forme la plus adaptée e f(x) pour repondre :

-calculer F(racinecarréde 3)

-resoudre l'equation f(x) = 0

-calculer f(4)

~~~~~~~~~~~~~~~~~MERCI~~~~~~~~~~~~~~~~~~~~~~~~

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