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chemithbeverle
@chemithbeverle
January 2021
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urgent niveau 3eme mathématiques ce devoir et composé de 3 exercices j'ai réussi les deux premiers mais pas celui-là il faut répondre aux 5 question.
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cricripedre
1/D =6m donc R =6/2=3m
V= 3,14*3²*1,80=50,868mètres cubes.
2/50,868*4,32 = 219,75 donc 220 euros
3/A = (6+x)(6+x) =(6+x)² =36 +6x+6x+x²= x²+12x+36
4/x² +12x +36 -x² =12x + 36
5/ 12x + 36 = 60 donc 12x = 60 - 36
12x = 24
x =24/12
x=2
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Lista de comentários
V= 3,14*3²*1,80=50,868mètres cubes.
2/50,868*4,32 = 219,75 donc 220 euros
3/A = (6+x)(6+x) =(6+x)² =36 +6x+6x+x²= x²+12x+36
4/x² +12x +36 -x² =12x + 36
5/ 12x + 36 = 60 donc 12x = 60 - 36
12x = 24
x =24/12
x=2