Предмет: Математика, автор: janjghavanikoloz3

x⁴-3x²-4=0
??????????

Ответы

Автор ответа: maksimusars
1

Ответ:

2 или -2

Пошаговое объяснение:

x⁴-3x²-4=0

t=x²

t²-3t-4=0

t1=4 ; t2=-1

x²=4

4²=//-1

x=+-2

x²)0

Автор ответа: sabirzelena
0

Ответ: х=±2.

Пошаговое объяснение:

х²=t

t²-3t-4=0

t₁₂=(3±√(9+16))/2.

t ₁₂=(3±5)/2.

t₁=4.

t₂=-1.

х²=4; х=±2.

t₂=-1 не подходит, так как х² не может быть отрицательным .

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