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anaisratier
@anaisratier
January 2021
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Pouvez vous m'aider svp c'est un devoir maison niveau 4eme merci d'avance
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winner123
Verified answer
Bonjour
a = 4 ( x² + 1)
b = 2 ( 4 - a)
c = 5 x ( y - 2)
A = - 7 x + 14
b = 4 x² + 12 x + 5 x + 15 = 4 x² + 17 x + 15
C = 27 x - 9 + 3 x² - x = 3 x² + 26 x - 9
D = 30 x² - 18 x - 10 x + 6 = 30 x² - 28 x + 6
je te laisse tester avec 1
B - C
4 x² + 17 x +15 - ( 3 x² + 26 x - 9)
4 x² + 17 x + 15 - 3 x² - 26 x + 9
x² - 9 x + 24
A - B + C -D
- 7 x + 14 - ( 4 x² + 17 x + 15) + 3 x² + 26 x - 9 - ( 30 x² - 28 x + 6)
- 7 x + 14 - 4 x² - 17 x - 15 + 3 x² + 26 x - 9 - 30 x² + 28 x - 6
= - 31 x² + 30 x - 16
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Il faut que je fasse les exos 105 et 106 c'est du niveau 4eme merci d'avance
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Verified answer
Bonjoura = 4 ( x² + 1)
b = 2 ( 4 - a)
c = 5 x ( y - 2)
A = - 7 x + 14
b = 4 x² + 12 x + 5 x + 15 = 4 x² + 17 x + 15
C = 27 x - 9 + 3 x² - x = 3 x² + 26 x - 9
D = 30 x² - 18 x - 10 x + 6 = 30 x² - 28 x + 6
je te laisse tester avec 1
B - C
4 x² + 17 x +15 - ( 3 x² + 26 x - 9)
4 x² + 17 x + 15 - 3 x² - 26 x + 9
x² - 9 x + 24
A - B + C -D
- 7 x + 14 - ( 4 x² + 17 x + 15) + 3 x² + 26 x - 9 - ( 30 x² - 28 x + 6)
- 7 x + 14 - 4 x² - 17 x - 15 + 3 x² + 26 x - 9 - 30 x² + 28 x - 6
= - 31 x² + 30 x - 16