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Sagot :

Faut faire quoi ? Developper ? Si c’est le cas
A = 5x - 13 - 9x - 12
= -4x - 25

B= 4x x (-7x) + 4x x 1 - 11 x -7 -11 x 1
= -28x^2 + 4x + 77 - 11
= 28x^2 + 4x + 66

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