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YaShe
@YaShe
August 2022
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X^3+x^2-x-1=0 решите уравнение
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nedenispolybomy
X^3+x^2-x-1=0
x(x^2+x-1)=1
x1=1, x^2+x-1=1; x(x-1)=2 ; x2=2, x-1=2 x3=3
Ответ: x1=1 ; x2=2 ; x3=3
1 votes
Thanks 2
хорошистка2014
X^2(x-1)+1(x-1)=0
(x^2+1)(x-1)=0
1)x-1=0
x=1
2)x^2+1=0
x^2=1
ответ: x=1
1 votes
Thanks 0
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Answers & Comments
x(x^2+x-1)=1
x1=1, x^2+x-1=1; x(x-1)=2 ; x2=2, x-1=2 x3=3
Ответ: x1=1 ; x2=2 ; x3=3
(x^2+1)(x-1)=0
1)x-1=0
x=1
2)x^2+1=0
x^2=1
ответ: x=1