Предмет: Алгебра, автор: romanmarkov2000

Найдите значение х, при котором равны значения выражений
х(2+х) и (х+4)(х-4)
7класс

Ответы

Автор ответа: Donottrustanyone
4
х( 2+х)=( х+4 ) (х-4) ; 2х + х^2 = х^2 -4 ^2 ; 2х+х^2 - х^2 = -4^2; 2х= 16 ; х= 8
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