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Hasnaa95190
@Hasnaa95190
May 2019
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De l'aide svpppp !!!!
Bonjour
En maths j'ai un devoir et j'arrive pas au premier exercice aidezzz moi svp piece jointe
Merci
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trudelmichel
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R=(2x+7)(2x-3)= 4x²+14x-6x-21= 4x²+8x-21
S= 2(2x+7)+2(2x-3)=2(2x+7+2x-3)=2(4x+4)=8(x+1)
R représente L x l soit l'aire
S (2x L)+(2 x l) soit le périmètre
BE=2BU
2x+7=2(2x-3)
2x+7=4x-6
7+6=2x
13=2x
x=6.5
si x=6.5 alors S= 8(6.5+1)= 8 x7.5=60
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Hasnaa95190
Merci beaucoup
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Verified answer
R=(2x+7)(2x-3)= 4x²+14x-6x-21= 4x²+8x-21S= 2(2x+7)+2(2x-3)=2(2x+7+2x-3)=2(4x+4)=8(x+1)
R représente L x l soit l'aire
S (2x L)+(2 x l) soit le périmètre
BE=2BU
2x+7=2(2x-3)
2x+7=4x-6
7+6=2x
13=2x
x=6.5
si x=6.5 alors S= 8(6.5+1)= 8 x7.5=60