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Réponse :

Bonjour ☻

Factoriser

Explications étape par étape

A = 36x^2 - 1

A = (6x)^2 - 1^2

A = (6x - 1)(6x + 1)

B = (9x + 4)^2 - 49x^2

B = (9x + 4)^2 - (7x)^2

B = (9x + 4 - 7x)(9x + 4 + 7x)

D = 9x^2 + 18x + 9

D = (3x)^2 + 2 * 3x * 3 + 3^2

D = (3x + 3)^2