Réponse :
Explications étape par étape
Bonjour
Factoriser :
= a(3 - x)(4a - 4 + 1)
= a(3 - x)(4a - 3)
= x(a + b + c)(2 - 7y + x)
= (2u + 1)(a^2 - 2ab + b^2)
= (2u + 1)(a - b)^2
= (5a - b)(x^2 - 2xy + y^2)
= (5a - b)(x - y)^2
= (7a - b)^2 + 4a(7a - b) + 12b(7a - b)
= (7a - b)(7a - b + 4a + 12b)
= (7a - b)(11a + 11b)
= (7a - b) * 11(a + b)
= 11(7a - b)(a + b)
= (2x + 3)(a^2 - 4a - 21)
