Réponse :
Bonjour
(3a-8b+4)-(5b-7)
=3a-8b+4-5b+7
=3a-13b+11
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Réponse :
Bonjour
(3a-8b+4)-(5b-7)
=3a-8b+4-5b+7
=3a-13b+11