Предмет: Алгебра, автор: Соня666666

решите уравнение 3^2-2х=81

Ответы

Автор ответа: izabella9

0

9-2x=81
-2x=81-9
-2x=72
X=-36
...

Автор ответа: irreversibility

0

$3 ^{2-2x} =81,$
$3 ^{2-2x} =3 ^{4} ,$
$2-2x=4,$
$x=-1.$
Ответ: -1

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