Предмет: Алгебра, автор: paclinaira

Помогите срочно прошу !!!!

Приложения:

Ответы

Автор ответа: Аноним

Ответ:

Объяснение:

При x=-2

-3(2-x)²-10x=-3(4-4x+x²)-10x=-3x²+12x-12-10x=-3x²+2x-12=-3·(-2)²+2·(-2)-12=-12-4-12=-28

9x²-1-(3x-2)²=0

(3x-3x+2)(3x+3x-2)=1

2(6x-2)=1

12x=1+4

x=5/12

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