Réponse :
A = 2x - 8 - x + 6x - 2 = 7x - 10
B = 4x + 6 - 16x² - 20x + 20x + 25 = -16x² + 4x + 31
C = 6x - 2 - 2x - 6 = 4x - 8
D= 16x² + 4x - 4x - 1 = 16x² - 1
E = 2x - 2 - 2(6x² + x - 6x - 1) + 6x + 1 = 2x - 2 - 12x² - 2x + 12x + 2 + 6x + 1 =-12x² + 18x + 1
F = (2x² - x + 1)(3x - 2) = 6x^3 - 4x^4 - 3x² + 2x + 3x - 2 = -4x^4 + 6x^3 - 3x² + 5x - 2
G = x² - 3x + 2
H = 2x - 1
Explications étape par étape