Предмет: Алгебра, автор: fasteros

Помогите с примером 9-x=x^2+6x+9

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Автор ответа: Yanke13
0
9-x=x^2+6x+9 -x-x^2-6x=9-9 -x^2-7x=0 x^2+7x=0 x(x+7)=0 x=0 x+7=0 x= -7 Ответ: 0 и -7
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