Предмет: Математика, автор: maksimlogin388

Розв'яжіть рівняня5x^4+3x^2-2=0​

Ответы

Автор ответа: oqilovmehrob
1

Ответ:

обозначаем

{x}^{2} = y

5 {y}^{2} + 3y - 2 = 0 \\ d = 9 + 40 = 49 \\ y1 = \frac{ - 3 + 7}{10} = \frac{4}{10} = \frac{2}{5} \\ y2 = \frac{ - 3 - 7}{10} = \frac{ - 10}{10} = - 1 \\ {x1}^{2} = \frac{2}{5} \\ x1 = \sqrt{ \frac{2}{5} }

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