[tex] {x}^{4} - 3 {x}^{2} - 4 = 0 \\ {t}^{2} - 3t - 4 = 0 [/tex]
t=-1 t=4
x²=-1 x²=4
Ответ: x1=-2 x2=2
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[tex] {x}^{4} - 3 {x}^{2} - 4 = 0 \\ {t}^{2} - 3t - 4 = 0 [/tex]
t=-1 t=4
x²=-1 x²=4
Ответ: x1=-2 x2=2