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annagromova01
@annagromova01
July 2022
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(2x-1)²-9=0
Помогите пожалуйста, срочно надо. Проходим теорему Виета.
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yanaaleksandrov
Теорема виета
x1+x2= -b/a
x1*x2=c/a
(2x-1)^2-9=0
4x^2-4x+1-9=0
4x^2-4x-8=0
x1+x2= - (-4)/4= 1
x1*x2= (-8)/4= -2
x1=2
x2= -1
2 votes
Thanks 2
annagromova01
Спасибо вам огромное
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Answers & Comments
x1+x2= -b/a
x1*x2=c/a
(2x-1)^2-9=0
4x^2-4x+1-9=0
4x^2-4x-8=0
x1+x2= - (-4)/4= 1
x1*x2= (-8)/4= -2
x1=2
x2= -1