Réponses

  • Utilisateur Brainly
2013-07-11T09:51:28+02:00

3(x-1)²+13

=3(x²-2x+1)+13

=3x²-6x+3+13

=3x²-6x+16

 

C(x)=(2x-5)²-x²+14x-9

       =4x²-20x+25-x²+14x-9

       =3x²-6x+16

 

donc C(x)=3(x-1)²+13