Je n'arrive pas à résoudre ces deux équations :
a) x² = 25/16
b) 7x² + 3 = 6x² + 27

By: USER8621
27 Agustus 2025 mathematiques 5 minutes
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Question

Grade: Education Subject: mathematiques
Je n'arrive pas à résoudre ces deux équations :
a) x² = 25/16
b) 7x² + 3 = 6x² + 27
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Answer (95)

Best Answer
(146)
a) [tex] x=\sqrt{25/16}=5/4[/tex] ou -5/4

b) 7x^2-6x^2=27-3

[tex] x=\sqrt{24} = 2\sqrt{6} [/tex] ou - 2[tex] \sqrt{6} [/tex]
Answered on 27 Agustus 2025
(173)
a) x²-25/16 = 0
(x-5/4)(x+5/4) = 0

x = 5/4 ou -5/4

7x²+3-x²-27 = 0
6x² -24 = 0
6x² = 24
x² = 4
x = V2 ou -V2
6x² =
Answered on 27 Agustus 2025

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