Réponse :
Explications étape par étape
Factoriser :
d = 21x + 5y - 14
D = 7 * 3x + 5y - 7 * 2
D = 7(3x - 2) + 5y
e = (2x + 4)(6x - 1) + (2x + 4)(3x + 7)
E = (2x + 4)(6x - 1 + 3x + 7)
E = 2(x + 2)(9x + 6)
E = 2(x + 2) * 3(3x + 2)
E = 6(x + 2)(3x + 2)
f = 36x^2 - 25
F = (6x)^2 - 5^2
F = (6x - 5)(6x + 5)