C'est les exercices n°23,24,25 et 26 que je dois faire pour demain mais je n'y arrive pas.... Pergunta de ideia deClara89200

Clara89200 @Clara89200

April 2019 1 106 Report

C'est les exercices n°23,24,25 et 26 que je dois faire pour demain mais je n'y arrive pas

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bouki83 N°23 )

A=2×4×4+4+1
A=2×2×4 +4 +1
A=5×4+1
A=20+1
A=21

B ILLISIBLE
D ILLISIBLE

C=2×10×10+10+1
C=2×2×10+10 +1
C=5×10+1
C=51

24)
A=3×a
A=3a

B=1×b
B=b

C=8×b×b
C=8b²
D=3×(2×b-1)
D=3(2b-1)
E= 7×a×3×a
E=21a²

F=6a³

25)

G=8πr
H=2.5×0.4×5.5a³
I=(1/8)ab

J=(5/14)a³

26)

a/

aire α du premier rectangle

α=DC×7
DC=5x

donc
α=5x×7
α=35x

b)

aire β du second rectangle

β=AB×BC

AB=5x
BC=4x

d'où

β= 5x×4x
β=20x²

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