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Elisarnd
@Elisarnd
May 2019
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Bonjour j’aimerai savoir si cet exercice est juste svp merci
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Louve213
Verified answer
Bonjour,
A = 3(7x - 2)
= 3*7x - 3*2
= 21x - 6
B = -4x(2x - 9)
= -4x * 2x - (-4x)*9
= -8x² - (-36x)
= -8² + 36x
C = 6x + 2(-7x - 5)
= 6x + 2 * (-7x) - 2 * 5
= 6x + (-14x) - 10
= 6x - 14x - 10
= -8x - 10
D = 3x - 5(2x + 4)
D = 3x - 5 * 2x - 5 * 4
D = 3x - 10x
- 20
D = -7x
- 20
En dessus la correction, j'ai refais pour vérifier si tu as bon et.. C'est tout juste, bravo ! ^^ Mais juste pour le D c'est - 20 pas + 20
2 votes
Thanks 2
elisarnd
mercii
Louve213
Derien ;)
taalbabachir
Tout est juste sauf le d) c'est - 7 x - 20 au lieu de - 7 x + 20
0 votes
Thanks 1
elisarnd
merci !
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Lista de comentários
Verified answer
Bonjour,A = 3(7x - 2)
= 3*7x - 3*2
= 21x - 6
B = -4x(2x - 9)
= -4x * 2x - (-4x)*9
= -8x² - (-36x)
= -8² + 36x
C = 6x + 2(-7x - 5)
= 6x + 2 * (-7x) - 2 * 5
= 6x + (-14x) - 10
= 6x - 14x - 10
= -8x - 10
D = 3x - 5(2x + 4)
D = 3x - 5 * 2x - 5 * 4
D = 3x - 10x - 20
D = -7x - 20
En dessus la correction, j'ai refais pour vérifier si tu as bon et.. C'est tout juste, bravo ! ^^ Mais juste pour le D c'est - 20 pas + 20