Réponses

2014-04-14T20:12:36+02:00
(2x-3)[3(2x-3)-1]
=(2x-3) (6x-9-1)
=(2x-3) (6x-10)
2014-04-14T20:20:13+02:00
Factoriser cette expression :
=3(2x-3)²-(2x-3)
=( 2x-3) [3(2x-3) - 1]
=(2x -3) (6x -9 -1)
= (2x -3)(6x -10)
= (2x-3) 2(3x -5)