Предмет: Математика, автор: Edgar18

Решите уравнение -9=8x-x в квадрате.

Ответы

Автор ответа: Аноним

- X^2 + 8X + 9 = 0
D = 64 - 4*(-1)*9 = 64 + 36 = 100
V D = 10
X1 = ( - 8 + 10) : ( - 2 ) = ( - 1 )
X2 = ( - 18 ) : ( - 2 ) = 9
ОТВЕТ 9 и ( - 1 )

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