Réponses

  • Utilisateur Brainly
2014-09-28T11:24:48+02:00
A(x) = (2x + 1)(x - 3) - 4x + 1
= 2x² - 6x + x - 3 - 4x + 1
= 2x² - 9x - 2

B(x) = (4x - 5)²
= 16x² - 40x + 25

C(x) = 2(x - 1)(x + 3)
= (2x - 2)(x + 3)
= 2x² + 6x - 2x - 6
= 2x² + 4x - 6