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Sagot :

Réponse :

Bonjour

Explications étape par étape :

C = 5x^2 - (3x+1)(x-2)

C = 5x^2 - (3x^2 - 6x + x - 2)

C = 5x^2 - 3x^2 + 6x - x + 2

C = 2x^2 + 5x + 2

D = 2x (x+3)(x-5)

D = 2x( x^2 - 5x + 3x - 15)

D = 2x^3 - 10x^2 + 6x^2 - 30x

D = 2x^3 - 4x^2 - 30x

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