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cecdruguet
@cecdruguet
October 2020
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Bonjour. Je n'ai pas compris cet exercice niveau 3eme:
Factorise puis réduit chaque expression
J=(x-4)²-(2x-1)²
a²-b² avec a=............ et b=.............
K=(7x+8)²-(9-5x)²
On considère L=(2x+1)²-49
a- Développe puis réduis L.
b- Factorise L.
Merci d'avance
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