Réponses

2013-02-06T18:30:36+01:00
2013-02-06T18:32:33+01:00

f(x) = (2x-1) (3+x)

 = 6x+2x²-3-x

f(x)=2x²-5x-3

 

Donc  2x²+5x-3 = (2x-1) (3+x)