Soit A=3√15 x2√35-2√84-7√105/√5

Ecrire A sous la forme a√b ou a et b sont deux entiers naturels a déterminer .
Le détail des différents calculs devra figurer sur votre feuille.

Merci d'avance !

By: USER1863
26 Agustus 2025 mathematiques 5 minutes
4.5
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Question

Grade: Education Subject: mathematiques
Soit A=3√15 x2√35-2√84-7√105/√5

Ecrire A sous la forme a√b ou a et b sont deux entiers naturels a déterminer .
Le détail des différents calculs devra figurer sur votre feuille.

Merci d'avance !
Asked by:
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Answer (246)

Best Answer
(216)
Soit A=3√15 x2√35-2√84-7√105/√5
A= 6 √15*35 - 2√4*21- 7 √21*5/√5
A = 6 √525 - 4 √21 - 7 √21
A = 6 √25*21 - 4 √21 - 7 √21
A = 30 √21 - 4 √21 - 7 √21
A = 19 √21
Answered on 26 Agustus 2025

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