Réponse :
a) = (3x + 2)(5 - 2x)
a) = 15x + 10 - 6x² - 4x
a) = -6x² + 11x + 10
b) = (x - 1)(3x² - 2)
b) = 3x³ - 3x² - 2x + 2
c) = 2(3 - 2x)x - 2(x - 2)
c) = 2x(3 - 2x) - 2(x - 2)
c) = 6x - 4x² - 2x + 4
c) = -4x² + 4x +4
d) = [2 + 2(x - 5)](x - 1)
d) = (2 + 2x - 10) (x - 1)
d) = (2x - 8)(x - 1)
d) = 2x² - 8x - 2x + 8
d) = 2x² - 10x + 8
e) = (5x + 1)[2(x - 1) - 5x]
e) = (5x + 1)(2x - 2 - 5x)
e) = (5x + 1)(-3x - 2)
e) = -15x² - 3x - 10x - 2
e) = -15x² - 13x - 2
Explications étape par étape
