Предмет: Алгебра, автор: 34357687656

Помогите пожалуйста!(2x+1)(x+3)=x(x-4)+3

Ответы

Автор ответа: Аноним

Ответ:

(2x + 1)(x + 3) = x(x - 4) + 3

2x² + 6x + x + 3 = x² - 4x + 3

2x² + 6x + x = x² - 4x

2x² + 7x = x² - 4x

2x² + 7x - x² + 4x = 0

x² + 11x = 0

x(x + 11) = 0

x1 = - 11, x2 = 0

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