Réponses

2012-12-17T21:43:54+01:00

(15x²-6x+35x-14)-(4x²-6x-6x+9)

= 15x²+29x-14+4x²+12x-9

= 19x² +41x -23

2012-12-17T21:44:41+01:00

Bonsoir,

 

 (3x+7)(5x-2)-(2x-3)(2x-3)

= 15x² - 6x + 35x - 17 - (2x² - 12x + 9)

= 15x² - 6x + 35x - 14 - 4x² + 12x - 9

Maintenant il te suffit de réduire.

= 11x² + 41x - 23