Réponses

2014-05-20T15:10:09+02:00
(2x+5)(1-x)
double distributivité
= 2x-2x²+5-5x
=-2x²-3x+5
2014-05-20T15:11:59+02:00
(2x+5)(1-x)=2x-2x²+5-5x
(2x+5)(1-x)=-2x²-3x+5