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Sagot :

Bonsoir

A = 3(x-4)
A = 3x - 12

B = 10+4x(x-1)
B = 10 + 4x² - 4x
B = 4x² -4x + 10

C = (x+2)x2+3x(3+x) --> Bizarre ...

Voilà ^^

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