Réponses

2013-05-09T15:00:41+02:00

V= (x-2) (x+2) - (3x + 1 ) (2x -3) 

  = x² + 2x  -2x -4 - 6x² - 9x + 2x - 3

 = 5x² + 7x -1

 

U= (2/3x - 4)²

   = (2/3 x - 4)  (2/3x - 4)

   = 4/6x² - 16/3x + 16