Réponses

2012-12-02T16:13:22+01:00
2012-12-02T16:16:29+01:00

A = (2x-5)²

A = (2x-5) x (2x-5)

A = 4x² - 10x - 10x + 25

A = 4x² -20x + 25

 

B = (4x+3) (4x-3)

B = 16x² - 12x + 12x -9

B = 16x² - x -9