Développer puis réduire

A = (3x-1)*-(4x+1)(x-1)
B= (7-2x)*-(x+1)*

Ps: le signe * signifie au carré

Merci de m'aider rapidement ..:)

By: USER4214
28 Agustus 2025 mathematiques 5 minutes
4.5
175 views 175 comments 13 shares
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Question

Grade: Education Subject: mathematiques
Développer puis réduire

A = (3x-1)*-(4x+1)(x-1)
B= (7-2x)*-(x+1)*

Ps: le signe * signifie au carré

Merci de m'aider rapidement ..:)
Asked by:
175 Viewed 175 Answers

Answer (175)

Best Answer
(446)
Développer puis réduire :

A = (3x - 1)² - (4x + 1) (x - 1)
A = 9x² - 6x + 1 - (4x² - 4x + x - 1)
A = 9x² - 6x + 1 - 4x² + 4x - x + 1
A = 9x² - 4x² - 6x - x + 4x + 1 + 1
A = 5x² - 3x + 2

B = (7 - 2x)² - (x + 1)²
B = 49 - 28x + 4x² - (x² + 2x + 1)
B = 49 - 28x + 4x² - x² - 2x - 1
B = 4x² - x² - 28x - 2x + 49 - 1
B = 3x² - 30x + 48
Answered on 28 Agustus 2025

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