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kristinaderyug
@kristinaderyug
August 2022
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Помогите решить уравнение : x^3+2x^2-x-2=0
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ilyushkina312
X^3+2x^2-x-2=0
(x^3+2x^2)-(x+2)=0
x^2*(x+2)-(x+2)=0
(x+2)*(x^2-1)=0
1)x+2=0
x=-2
2)x^2-1=0
x^2=1
x1=1
x2=-1
Ответ (х1=1,х2=-1,х3=-2)
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Дмитрий1425
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Answers & Comments
(x^3+2x^2)-(x+2)=0
x^2*(x+2)-(x+2)=0
(x+2)*(x^2-1)=0
1)x+2=0
x=-2
2)x^2-1=0
x^2=1
x1=1
x2=-1
Ответ (х1=1,х2=-1,х3=-2)