化简 (-2+sqrt(-8))/2

解答

化简

\frac{- 2 + - 8}{2}

- 1 + 2 i

求解步骤

\frac{- 2 + - 8}{2}

- 8 = 22 i

= \frac{- 2 + 2 2 i}{2}

因式分解出通项

2 : 2 (- 1 + 2 i)

= \frac{2 ( - 1 + 2 i )}{2}

约分:

2

= - 1 + 2 i

3 x^{3} - 48 x < x^{2} - 16

x^{2} - 4 x + 3 = 2

\frac{4}{x ^{2}} < \frac{5}{x ^{3}}

6 x^{2} + 6 x - 12 x = 1

∣ x - 8 ∣ < - 1