Articles
Register
Sign In
Search
hugo12
@hugo12
January 2021
1
162
Report
bonsoir, pouver-vous m'aider pour l'ex 1.Merci de votre aide
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
scoladan
Verified answer
Bonjour,
a) A(x) = (2x + 3)² - (2x + 6)²
= [(2x + 3) - (2x + 6)][(2x + 3) + (2x + 6)]
= -3(4x + 9)
b) A(x) < 0
⇔ -3(4x + 9) < 0
⇔ 4x + 9 > 0
⇔ 4x > -9
⇔ x > -9/4
c) (x + 2)(6x - 1) < (x + 2)(x - 3)
⇔ (x + 2)(6x - 1) - (x + 2) (x - 3) < 0
⇔ (x + 2)[(6x - 1) - (x - 3)] < 0
⇔ (x + 2)(6x - 1 - x + 3) < 0
⇔ (x + 2)(5x + 2) < 0
Tableau de signes
x -∞ -2 -2/5 +∞
(x + 2) - 0 + +
(5x + 2) - - 0 +
Produit + 0 - 0 +
Donc l'ensemble des solutions est : ]-2 ; -2/5[
0 votes
Thanks 0
More Questions From This User
See All
hugo12
July 2022 | 0 Respostas
Responda
hugo12
June 2021 | 0 Respostas
Responda
hugo12
June 2021 | 0 Respostas
Responda
hugo12
June 2021 | 0 Respostas
Responda
hugo12
June 2021 | 0 Respostas
Responda
hugo12
June 2021 | 0 Respostas
Responda
hugo12
June 2021 | 0 Respostas
Responda
hugo12
June 2021 | 0 Respostas
Responda
hugo12
June 2021 | 0 Respostas
Responda
hugo12
June 2021 | 0 Respostas
Responda
×
Report "bonsoir, pouver-vous m'aider pour l'ex 1.Merci de votre aide.... Pergunta de ideia de hugo12"
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,a) A(x) = (2x + 3)² - (2x + 6)²
= [(2x + 3) - (2x + 6)][(2x + 3) + (2x + 6)]
= -3(4x + 9)
b) A(x) < 0
⇔ -3(4x + 9) < 0
⇔ 4x + 9 > 0
⇔ 4x > -9
⇔ x > -9/4
c) (x + 2)(6x - 1) < (x + 2)(x - 3)
⇔ (x + 2)(6x - 1) - (x + 2) (x - 3) < 0
⇔ (x + 2)[(6x - 1) - (x - 3)] < 0
⇔ (x + 2)(6x - 1 - x + 3) < 0
⇔ (x + 2)(5x + 2) < 0
Tableau de signes
x -∞ -2 -2/5 +∞
(x + 2) - 0 + +
(5x + 2) - - 0 +
Produit + 0 - 0 +
Donc l'ensemble des solutions est : ]-2 ; -2/5[