Réponses

  • Utilisateur Brainly
2014-10-08T15:23:13+02:00
(8 - x)² + 4 = [(5 - x)² + 36] + 25
64 - 16x + x² + 4 = (25 - 10x + x² + 36) + 25
64 - 16x + x² + 4 = 61 + 25 - 10x + x²
68 - 16x + x² = 86 - 10x + x²
- 16x + 10x + x² - x² = 86 - 68
- 6x = 18
x = - 18/6
x = - 3

S= {- 3}