Articles
Register
Sign In
Search
Gugo671
@Gugo671
May 2019
1
69
Report
Bonjour! Qui pourrait m’aider à faire là questions 1 et 2 de mon devoir maison de maths niveau 3 eme. Merci d’avance m’aider
Please enter comments
Please enter your name.
Please enter the correct email address.
Agree to
terms and service
You must agree before submitting.
Send
Lista de comentários
loulakar
Verified answer
Bonjour,
La question 2) t’a déjà été répondu donc je vais faire la 1)
A = (5 - x/2)^2 + (2 - x)(5 - x/2)
1) développer :
A = 25 - 5x + x^2/4 + 10 - x - 5x + x^2/2
A = x^2/4 + (2x^2)/4 - 11x + 35
A = (3x^2)/4 - 11x + 35
2) factoriser :
A = (5 - x/2)(5 - x/2 + 2 - x)
A = (5 - x/2)(7 - x/2 - 2x/2)
A = (5 - x/2)(7 - 3x/2)
3) x = 5 et x = -2
A = (3 * 5^2)/4 - 11 * 5 + 35
A = (3 * 25)/4 - 55 + 35
A = 75/4 - 20
A = 75/4 - 80/4
A = -5/4
A = (5 - (-2)/2)(7 - 3 * (-2)/2)
A = (5 + 1)(7 + 3)
A = 6 * 10
A = 60
0 votes
Thanks 1
Gugo671
Svp
loulakar
x/2 ou 1/2 x c’est la même chose
loulakar
x^2/4 = 1/4 x^2
loulakar
3x/2 = 3/2 x
loulakar
etc... à toi de remplacer si nesoin
Gugo671
Ok merci beaucoup tu ma beaucoup aider
Gugo671
T calcule sont faux
Gugo671
L’es personne de ma classe les plus intelligent dit que vous avez fait
Gugo671
*faux
Gugo671
C’est quoi le ^ et *
More Questions From This User
See All
Gugo671
May 2019 | 0 Respostas
Responda
Gugo671
May 2019 | 0 Respostas
Responda
Gugo671
May 2019 | 0 Respostas
Responda
Gugo671
May 2019 | 0 Respostas
Responda
Gugo671
May 2019 | 0 Respostas
Responda
Gugo671
May 2019 | 0 Respostas
Responda
Gugo671
May 2019 | 0 Respostas
Responda
Gugo671
May 2019 | 0 Respostas
Responda
Gugo671
May 2019 | 0 Respostas
Responda
Gugo671
May 2019 | 0 Respostas
Responda
×
Report "Bonjour! Qui pourrait m’aider à faire là questions 1 et 2 de mon devoir maison de maths niveau 3 eme.... Pergunta de ideia de Gugo671"
Your name
Email
Reason
-Select Reason-
Pornographic
Defamatory
Illegal/Unlawful
Spam
Other Terms Of Service Violation
File a copyright complaint
Description
Helpful Links
Sobre nós
Política de Privacidade
Termos e Condições
direito autoral
Contate-Nos
Helpful Social
Get monthly updates
Submit
Copyright © 2024 ELIBRARY.TIPS - All rights reserved.
Lista de comentários
Verified answer
Bonjour,La question 2) t’a déjà été répondu donc je vais faire la 1)
A = (5 - x/2)^2 + (2 - x)(5 - x/2)
1) développer :
A = 25 - 5x + x^2/4 + 10 - x - 5x + x^2/2
A = x^2/4 + (2x^2)/4 - 11x + 35
A = (3x^2)/4 - 11x + 35
2) factoriser :
A = (5 - x/2)(5 - x/2 + 2 - x)
A = (5 - x/2)(7 - x/2 - 2x/2)
A = (5 - x/2)(7 - 3x/2)
3) x = 5 et x = -2
A = (3 * 5^2)/4 - 11 * 5 + 35
A = (3 * 25)/4 - 55 + 35
A = 75/4 - 20
A = 75/4 - 80/4
A = -5/4
A = (5 - (-2)/2)(7 - 3 * (-2)/2)
A = (5 + 1)(7 + 3)
A = 6 * 10
A = 60