URGENT !! DM : a) 4(a-1)² + 2a (3a+4) b) - (5a+1)² - 2(3a+4) c) (3a+4) (3a x -4) - (5a+4) d) (2a+1)² - (2a-1)² e) Calculer : (h = 3 / r = 7 / d = 6 / π = 3,14 )
Mathématiques
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Question
URGENT !!
DM :
a) 4(a-1)² + 2a (3a+4)
b) - (5a+1)² - 2(3a+4)
c) (3a+4) (3a x -4) - (5a+4)
d) (2a+1)² - (2a-1)²
e) Calculer : (h = 3 / r = 7 / d = 6 / π = 3,14 )
V = π r² x h² / 6
DM :
a) 4(a-1)² + 2a (3a+4)
b) - (5a+1)² - 2(3a+4)
c) (3a+4) (3a x -4) - (5a+4)
d) (2a+1)² - (2a-1)²
e) Calculer : (h = 3 / r = 7 / d = 6 / π = 3,14 )
V = π r² x h² / 6
1 Réponse
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1. Réponse nonotata
a) 4(a-1)² + 2a (3a+4)
4(a²-2ab+1) +6a²+8a
4a²-8ab+4 +6a²+8a
10a²+4
b) - (5a+1)² - 2(3a+4)
-(25a²+10a+1) -6a-8
-25a²-10a-1-6a-8
-25a²-16a-9
c) (3a+4) (3a x -4) - (5a+4)
9a²-12a+12a-16-5a-4
9a²-5a-20
d) (2a+1)² - (2a-1)²
4a²+4a+1 -(4a²-4a+1)
4a²+4a+1-4a²+4a-1
8a
e) Calculer : (h = 3 / r = 7 / d = 6 / π = 3,14 )
V = π r² x h² / 6
V = 3.14 x7² x3²/6
V = 3.14x49x9/6
V = 3.14 x49 x 3/2
V = 3.14 x 147/2
v = 230.79