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Автор - ruslanmarchenko520

Помогите пожалуйста,



Х=1/3​

Ответ

Автор - tatsach

Ответ:

Объяснение:

=5-2х²+4-х+8х²+2х+7х²=9+13х²+х

9+13*(1/3)²+1/3=9+13*1/9+1/3=9+1 4/9+1/3=9+1 4/9+3/9=10 7/9

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