Réponses

2014-09-12T14:54:55+02:00
2x² - 5x + 3
si x = -2

on a 2 x (-2)² - 5 x (-2) + 3 = 2 x 4 - (-10) + 3
= 8 +10 +3 = 18 + 3 = 21
  • Utilisateur Brainly
2014-09-12T14:57:21+02:00
2 * (- 2)² - 5 * (- 2) + 3
= 2 * 4 - (- 10) + 3
= 8 + 10 + 3
= 21