Question

Помогите решить .........................

Answer 1

1) x⁴ - 2x² - 8 = (x² - 4)(x² + 2) = (x - 2)(x + 2)(x² + 2) ) =

= (x - 2)(x + 2)(x - i√2)(x + i√2)

2) x⁴ - 4x² - 5 = (x² - 5)(x² + 1) = (x - √5)(x + √5)(x² + 1 ) =

= (x - √5)(x + √5)(x - i)(x + i)

4) x⁴ - 6x² + 8 = (x² - 4)(x² - 2) = (x - 2)(x + 2)(x - √2)(x + √2)