Предмет: Математика, автор: isaevaa1104


x (в квадратe) - 3
———— - 4x = -5
2


помогите!!!

Ответы

Автор ответа: matilda17562
1

Ответ:

1; 7.

Пошаговое объяснение:

\frac{x^{2}-3}{2}  - 4x = - 5\\ 2*\frac{x^{2}-3}{2}  - 2*4x = 2*(- 5) \\ x^{2}-3 - 8x = - 10\\ x^{2} - 8x  - 3 + 10 = 0\\ x^{2} - 8x  + 7 = 0\\ D = 64 - 28 = 36\\ x_{1}  = \frac{8-6}{2} = 1\\ x_{2}  = \frac{8+6}{2} = 7\\

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