Réponses

2013-02-28T18:55:30+01:00

A = (5x-4)(5x-4)-(2x-2)

= (5x-4)(5x-4-2x+2)

= (5x-4)(3x-2)

2013-02-28T19:39:58+01:00

A = (5x - 4)² - (5x - 4)(2x - 2)

   = (5x - 4) [(5x - 4) - (2x - 2)]

   = (5x - 4) (5x - 4 - 2x + 2)

   = (5x - 4)(3x - 2)