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Popoj4
@Popoj4
April 2019
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Bonjour,
J'ai besoins d'aide pour le 1 et dernier. Mais si vous voulez faire le reste pour que je compare pas de soucis :)
Merci à ceux qui vont m'aider!
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isapaul
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Bonjour
Exercice 1)
Développer
A = (2x - 1)² - x(2x - 1)
A = 4x² - 4x + 1 - 2x² + x
A = 2x² - 3x + 1
Factoriser
A = (2x - 1)(2x - 1 - x)
A = (2x - 1 )( x - 1 )
Pour x = 4
A = (7)(3) = 21
Exercice 4 )
a)
Aire AMIJ = x²
b)
MB = AB - AM = 8 - x
c)
KI = AD - IM = 10 - x
d)
f(x) = Aire AMIJ + Aire IHCK
f(x) = x² + (8 -x)(10 - x)
f(x) = x² +(80 - 8x - 10x + x²)
f(x) = 2x² - 18x + 80
1 votes
Thanks 2
MeriemG
Exercice 1)
Développer
A = (2x - 1)² - x(2x - 1)
A = 4x² - 4x + 1 - 2x² + x
A = 2x² - 3x + 1
Factoriser
A = (2x - 1)(2x - 1 - x)
A = (2x - 1 )( x - 1 )
Pour x = 4
A = (7)(3) = 21
Exercice 4 )
a)
Aire AMIJ = x²
b)
MB = AB - AM = 8 - x
c)
KI = AD - IM = 10 - x
d)
f(x) = Aire AMIJ + Aire IHCK
f(x) = x² + (8 -x)(10 - x)
f(x) = x² +(80 - 8x - 10x + x²)
f(x) = 2x² - 18x + 80
1 votes
Thanks 1
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BonjourExercice 1)
Développer
A = (2x - 1)² - x(2x - 1)
A = 4x² - 4x + 1 - 2x² + x
A = 2x² - 3x + 1
Factoriser
A = (2x - 1)(2x - 1 - x)
A = (2x - 1 )( x - 1 )
Pour x = 4
A = (7)(3) = 21
Exercice 4 )
a)
Aire AMIJ = x²
b)
MB = AB - AM = 8 - x
c)
KI = AD - IM = 10 - x
d)
f(x) = Aire AMIJ + Aire IHCK
f(x) = x² + (8 -x)(10 - x)
f(x) = x² +(80 - 8x - 10x + x²)
f(x) = 2x² - 18x + 80
Développer
A = (2x - 1)² - x(2x - 1)
A = 4x² - 4x + 1 - 2x² + x
A = 2x² - 3x + 1
Factoriser
A = (2x - 1)(2x - 1 - x)
A = (2x - 1 )( x - 1 )
Pour x = 4
A = (7)(3) = 21
Exercice 4 )
a)
Aire AMIJ = x²
b)
MB = AB - AM = 8 - x
c)
KI = AD - IM = 10 - x
d)
f(x) = Aire AMIJ + Aire IHCK
f(x) = x² + (8 -x)(10 - x)
f(x) = x² +(80 - 8x - 10x + x²)
f(x) = 2x² - 18x + 80