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marinaKurkina
@marinaKurkina
July 2022
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х^2-4x/x^2-1=7x-4/1-x^2 Найдите корни уравнения
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sharadi
Verified answer
х^2-4x/x^2-1=7x-4/1-x^2
х^2-4x/x^2-1=(-7x+ 4)/(-1+x^2) (х
²-1≠0,⇒х² ≠1,⇒х≠+-1)
х
² -4х = 4 -7х
х
² +3х -4 = 0
х= - 4 и х = 1(по т. Виета)
Ответ:-4
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Answers & Comments
Verified answer
х^2-4x/x^2-1=7x-4/1-x^2х^2-4x/x^2-1=(-7x+ 4)/(-1+x^2) (х²-1≠0,⇒х² ≠1,⇒х≠+-1)
х² -4х = 4 -7х
х² +3х -4 = 0
х= - 4 и х = 1(по т. Виета)
Ответ:-4