1. 4x(x²-16) = 0
4x(x-4)(x+4) = 0
[x = 0
[x = ±4
2. x²-6 = t
t²-2t-15 = 0
Теорема Виета:
{t1+t2 = 2
{t1•t2 = -15
t1 = 5
t2 = -3
1)x²-6 = 5
x² = 11
x = ±✓11
2)x²-6 = -3
x² = 3
x = ±✓3
