Question

Помогите,решить уравнение:
3x^{4} - 13x^{2}+4=0

Answer 1

Решение
3x^{4} - 13x^{2}+4=0
x² = t, t ≥ 0
3t² - 13t + 4 = 0
D = 169 - 4*3*4 = 121
t1 = (13 - 11)/6
t1 = 1/3
t2 = (13 + 11)/6
t2 = 4
1)  x² = 1/3
x1 = - √3/3
x2 = √3/3
2)  x² = 4
x3 = - 2
x4 = 2