Exercice 2: Factoriser les expressions suivantes.
A = 5x² + 15x + 20
B = 4x² + 16x
C = (5x + 2)(3x + 4) + 4(3x + 4)
D = (3x) (2x + 4) + (3-x)(3x - 4)
E = (x + 1)(x-1)-(2x + 3)(x - 1)
F = 9x² + 6x +1
G = 36-36x + 9x²
H = (x + 5)(3-2x) - (3-2x)²