Предмет: Алгебра, автор: falconvladislav

розв'яжи рівняння (7-2х)^2-(2х-3)(2х+3)=100

Ответы

Автор ответа: fdanya783

2

Відповідь:

x=-1,5

Пояснення:

49-28x+4x^2-(4x^2-6x+6x-9)=100

-28x+49+9=100

-28x=100-58

28x=-42

x=-1,5

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