Réponses

2014-05-03T17:07:52+02:00
(4x+5)(x+3) = 4x*x+4x*3+5*x+5*3 = 4x²+12x+5x+15 = 4x²+17x+15
2014-05-03T17:08:21+02:00
(4x+5) (x+ 3)
4x²+ 5x + 12x + 15
4x² + 17x + 15

( normalement)