Bonsoir, Je n'arrive pas à développer cette expression :

12.5 -2(x-2.5)²

Je sais pas comment faire les étapes.

Merci bien.

By: USER8193
28 Agustus 2025 mathematiques 5 minutes
4.5
160 views 160 comments 13 shares

Question

Grade: Education Subject: mathematiques
Bonsoir, Je n'arrive pas à développer cette expression :

12.5 -2(x-2.5)²

Je sais pas comment faire les étapes.

Merci bien.
Asked by:
160 Viewed 160 Answers

Answer (160)

Best Answer
(112)
re,

12,5-2(x²-5x+6,25) =
12,5-(2x²-10x+12,5) =
tu finis, tu enleves les (), tu réduis
Answered on 28 Agustus 2025
(163)
Bonsoir , 
12,5 - 2(x-2,5)²
12,5 - 2(x² + 6,25 - 5x)
12,5 - [ 2x² + 12,5 - 10x ]
12,5 - 2x² - 25 + 10x ]
-2x² + 10x + 25 
Answered on 28 Agustus 2025

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