Question

Решите уравнение в комплексных числах
х² − 4 + 8 = 0

Answer 1

x² - 4x + 8 = 0
D = 16 - 32 = -16 = 16i²
√D = 4i
x1 = (4-4i)/2 = 2-2i
x2 = (4+4i)/2 = 2+2i

x² - 4 + 8 = 0
x² + 4 = 0
x² = -4
x² = 4i²
x1 = -2i
x2 = 2i

Answer 2

Спасибо :*

Answer 3

x² - 4 + 8 = 0
x² + 4 = 0
x² = -4
x² = 4i²
x1 = -2i
x2 = 2i