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Sagot :

Bonjour

Développer réduire et ordonner :

B = 3 – 5x(-x + 1)

B = 3 + 5x² - 5x

B = 5x² - 5x + 3

E = 2x(-x-3)-(-2x+1)

E = - 2x² - 6x + 2x - 1

E = - 2x² - 4x - 1.

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