Réponses

2014-01-19T16:41:50+01:00
B= 4x² + (3x+4)² 
B= 4x² + 9x² + 24x + 16
B= 13x² + 24x + 16

C= 6x² - (3x+2)² 
C= 6x² - (9x² + 12x + 4)
C= 6x² - 9x² - 12x - 4
C= - 3x² - 12x - 4

D= 2x - (3x + 4)(4x+3)
D= 2x - (12x² + 9x + 16x + 12)
D= 2x - 12x - 9x - 16x -12
D= - 12x² - 23x - 12