zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的代数 >

4s^2+4s+5=0

解答

4 s^{2} + 4 s + 5 = 0

解答

s = - \frac{1}{2} + i, s = - \frac{1}{2} - i

求解步骤

4 s^{2} + 4 s + 5 = 0

使用求根公式求解

s_{1, 2} = \frac{- 4 \pm 4 ^{2} - 4 \cdot 4 \cdot 5}{2 \cdot 4}

化简

4^{2} - 4 \cdot 4 \cdot 5 : 8 i

s_{1, 2} = \frac{- 4 \pm 8 i}{2 \cdot 4}

将解分隔开

s_{1} = \frac{- 4 + 8 i}{2 \cdot 4}, s_{2} = \frac{- 4 - 8 i}{2 \cdot 4}

s = \frac{- 4 + 8 i}{2 \cdot 4} : - \frac{1}{2} + i

s = \frac{- 4 - 8 i}{2 \cdot 4} : - \frac{1}{2} - i

二次方程组的解是:

s = - \frac{1}{2} + i, s = - \frac{1}{2} - i

作图

流行的例子

0=-2.7t^2+30t+6.5

0 = - 2.7 t^{2} + 30 t + 6.5

(-5)^2+(2)^2=D^2

(- 5)^{2} + (2)^{2} = D^{2}

3 x (x + 2) = 6 (x - 3)

- 3 x^{2} - 48 x = 0

- 2 x^{2} + 7 x + 15 = 0