Voici deux expressions: A = 2 X x + 1 + x + x et B= 2 + x X x + 2 .
a. Calculer les expressions A et B lorsque x =1
b. Caluler les expressions A et B lorsque x = 3

c. Julien dit que: 2 X x +1+ x + x = 2 + x X x X x + 2

Vrai ou faux ? Julien a t il raison ? Justifier la réponse ?
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