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Sagot :

Réponse :

reduire

A= 36x2-25

A= 72-25

A= 47

B= 49x2-4

B= 98-2

B= 96

C= (3x-1)2-9

C= 2 x 3x - 2 x 1 -9

C= 6x -2 -9

C= 6x -11

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