S'il vous plait aidez moi en maths

1) Résoudre les deux équations suivantes : 4,2x-12,6=0 & -5x+12=0
2) Le nombre 7 est-il une solution de l'équation x²-6x=7 ? JUSTIFIER

Merci d'avance pour votre aide

By: USER9461
26 Agustus 2025 mathematiques 5 minutes
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239 views 239 comments 13 shares
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Question

Grade: Education Subject: mathematiques
S'il vous plait aidez moi en maths

1) Résoudre les deux équations suivantes : 4,2x-12,6=0 & -5x+12=0
2) Le nombre 7 est-il une solution de l'équation x²-6x=7 ? JUSTIFIER

Merci d'avance pour votre aide
Asked by:
239 Viewed 239 Answers

Answer (239)

Best Answer
(169)
4.2x - 12.6 = 0
4.2x = 12.6
x = 12.6/4.2
x = 3

-5x + 12 = 0
-5x = -12
x = 12/5

2) x² - 6x = 7² - 6 * 7 = 49 - 42 = 7
Answered on 26 Agustus 2025
(198)
Bonjour,
1) Résoudre les deux équations suivantes :
4,2x-12,6=0
4.2x= 12.6
x= 12.6/4.2
x= 3

-5x+12=0
-5x= -12
x= -12/-5
x= 12/5
Answered on 26 Agustus 2025

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