Réponses

  • Utilisateur Brainly
2014-09-06T18:30:40+02:00
(3x + 7)² = (7x - 10)²
(3x + 7)² - (7x - 10)² = 0

3x + 7 = 7x - 10
7 + 10 = 7x - 3x
17 = 4x
17/4 = x

3x + 7 = -(7x - 10)
3x + 7 + 7x - 10 = 0
10x = 3
x = 3/10

S= {3/10 ; 17/4}