Предмет: Алгебра, автор: katyaefremova4

корень из X^2-56=корень -х

Ответы

Автор ответа: AnonimusPro

0

x^2-56=-x;
x^2+x-56=0;
D=225;
x1=7; - не подх
x2=-8;
Ответ: x=-8

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