Réponse :
Bonsoir
Explications étape par étape
E = (2x+1)^2 + (2x+1)
E = (2x+1)(2x+1+1)
E = (2x+1)(2x+2)
E = (2x+1)*2(x+1)
E = 2(2x+1)(x+1)
F = 3(2x-3)^2 - (2x-3)
F = (2x-3)[3(2x-3) - 1]
F = (2x-3)(6x-9-1)
F = (2x-3)(6x-10)
F = (2x-3)*2(3x-5)
F = 2(2x-3)(3x-5)