Réponses

2014-06-23T18:04:31+02:00
2014-06-23T18:06:09+02:00
Exercice 47:
a. (y+5)(y-4)
 = Yaucarré-4y+5y-20
= Yaucarré+y-20

b. (4-3x)(x+2)
= 4x+8-3Xaucarré-6
= 4x+2-3Xaucarré