Réponses

  • Utilisateur Brainly
2014-03-23T13:20:34+01:00
f (x) = 2 (x-1)² -8
       =2(x²-2x+1)-8
       =2x²-4x+2-8
       =2x²-4x-6

f(x)=2(x-1)²-8
    =2((x-1)²-4)
     =2((x²-1)²-2²)
     =2(x-1-2)(x-1+2)
     =2(x-3)(x+1)