Réponses

2013-10-13T12:58:58+02:00
A(x)=9(4x²-4x+1)+x(6x-3)-2x+1
A= (36x²-36x+9)+6x²-3x-2x+1
A= (6x-3)²+6x²-5x+1
A= (
6x-3)²+x(6x-5)+1