Réponses

  • Utilisateur Brainly
2014-03-15T12:30:31+01:00
Bonjour,

(x-2)²-25 = 0
(x-2-5)(x-2+5) = 0
(x-7)(x+3) = 0

x-7 = 0
x =7
x+3 = 0
x = -3