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Meilleure réponse !
  • Utilisateur Brainly
2014-09-17T18:11:14+02:00
(4x + 1)² = 0
4x + 1 = 0
4x = - 1
x = - 1/4

(4x + 1)² = 16
(4x + 1)² - 16 = 0
(4x + 1)² - 4² = 0
(4x + 1 - 4)(4x + 1 + 4) = 0
(4x - 3)(4x + 5) = 0
4x - 3 = 0  ou 4x + 5 = 0
4x = 3       ou 4x = - 5
x = 3/4      ou x = - 5/4

- 3x(7 - 2x) = 0

- 3x = 0     ou   7 - 2x = 0
x = 0/3      ou   2x = 7
x = 0         ou    x = 7/2