bj pourraistu m aider pour la question 5

Réponse:

bonjour

1. 36x² - 25

= (6x - 5)(6x + 5)

(3eme identité remarquable)

2. 36x² - 25 - (3x+1)(6x-5)

= (6x - 5)(6x + 5) - (3x +1)(6x-5)

= (6x-5)(6x + 5 -(3x+1))

= (6x-5)(6x+5-3x-1)

= (6x-5)(3x+4)

3. (6x-5)(3x+4)

6x -5 = 0 3x +4 = 0

6x = 5 3x = -4

x = 5/6 x = -4/3