Bonjour pouvez vous m’aidez, developper et réduire
a) -3(x + 4)(2x - 5) - (x + 8)
b) 3x(x - 4) - (x + 2)(2x - 1)

By: USER5255
27 Agustus 2025 mathematiques 5 minutes
4.5
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Question

Grade: Education Subject: mathematiques
Bonjour pouvez vous m’aidez, developper et réduire
a) -3(x + 4)(2x - 5) - (x + 8)
b) 3x(x - 4) - (x + 2)(2x - 1)
Asked by:
133 Viewed 133 Answers

Answer (133)

Best Answer
(353)

Bonjour,

a) -3(x + 4)(2x - 5) - (x + 8)

= -3[x × 2x + x × (-5) + 4 × 2x + 4 × (-5)] + (-x) - 8

= -3(2x² - 5x + 8x - 20) - x - 8

= -6x² + 15x - 24x + 60 - x - 8

= -6x² - 10x + 52 ✅

b) à toi d'essayer pour t'entraîner.

Bonne journée !

Answered on 27 Agustus 2025

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