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Réponse :

Explications étape par étape

(a - b)^2 = a^2 - 2ab + b^2

(a + b)^2 = a^2 + 2ab + b^2

(a - b)(a + b) = a^2 - b^2

Bonjour

A = (6 - 7x)^2

A = 36 - 84x + 49x^2

B = (5y + 7z)^2

B = 25y^2 + 70yz + 49z^2

C = (4t - V13)(4t + V13)

C = 16t^2 - 13

D = (2x - 3V7)^2

D = 4x^2 - 12xV7 + 63

E = (3u + 2/3)^2

E = 9u^2 + 4u + 4/9