Réponses

  • Utilisateur Brainly
2013-11-01T18:21:59+01:00
f (x)=(x-2)(x+6)
=x²-2x+6x-12
=x²+4x-12

f(x)=(x+2)²-16
=x²+4x+4-16
=x²+4x-12