Bonjour, c'est un dm urgent pour demain aidez moi svp :

EXO - Factoriser les expressions :

A = (-7x - 6) (x + 5) + (8x - 9) (x + 5)
B = 5 (5 - 2x) (x+1) + 5 (8x - 5) (x+1)
C = 6 (x + 1) (3x - 2) - 2(2 - 5x) (x + 1)
D = 16(x - 1)² - 8(x-1) (x+5)

1

Réponses

  • Utilisateur Brainly
2014-09-14T15:10:53+02:00
A = (-7x - 6) (x + 5) + (8x - 9) (x + 5)
A = (x + 5)(- 7x - 6 + 8x - 9)
A = (x + 5)(x - 15)

B = 5 (5 - 2x) (x+1) + 5 (8x - 5) (x+1)
B= (x + 1)(25 - 10x + 40x - 25)
B= (x + 1)(30x)

C = 6 (x + 1) (3x - 2) - 2(2 - 5x) (x + 1)
C = (x + 1)(18x - 12 - 4 + 10x)
C= (x + 1)(28x - 16)

D = 16(x - 1)² - 8(x-1) (x+5)
D= (x - 1)(16x - 16 - 8x - 40)
D= (x - 1)(8x - 56)