Réponse :
B(x) = 3 - 2x(4x + 1) + 3x(x - 1)(x + 2) = 3 - 8x² - 2x + 3x(x² + 2x - x - 2) = 3 - 8x² + x + 3x^3 + 6x² - 3x² - 6x = 3x^3 - 5x² - 6x + 3
C (x) = (2x + 3)² - (2x + 3)(-4x + 2)
C(x) = (2x+3)(2x+3)-(2x+3)(-4x+2)
C(x) =(2x+3)[(2x+3)-(-4x+2)]
C(x) = (2x+3)(2x+3-4x+2)
C(x) =(2x+3)(-2x+5)
D(x) = 25 - 4x² + (5 - 2x)(5x + 4) - 3(5 - 2x)
25 - 4x² = (5-2x)(5+2x)(
D(x) = (5-2x)[(5x+4) - 3] = (5-2x)(5x+1)
Explications étape par étape
