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 >

2x^2+3x-11=0

解答

2 x^{2} + 3 x - 11 = 0

解答

x = \frac{- 3 + 97}{4}, x = \frac{- 3 - 97}{4}

+1

十进制

x = 1.71221 \dots, x = - 3.21221 \dots

求解步骤

2 x^{2} + 3 x - 11 = 0

使用求根公式求解

x_{1, 2} = \frac{- 3 \pm 3 ^{2} - 4 \cdot 2 ( - 11 )}{2 \cdot 2}

3^{2} - 4 \cdot 2 (- 11) = 97

x_{1, 2} = \frac{- 3 \pm 97}{2 \cdot 2}

将解分隔开

x_{1} = \frac{- 3 + 97}{2 \cdot 2}, x_{2} = \frac{- 3 - 97}{2 \cdot 2}

x = \frac{- 3 + 97}{2 \cdot 2} : \frac{- 3 + 97}{4}

x = \frac{- 3 - 97}{2 \cdot 2} : \frac{- 3 - 97}{4}

二次方程组的解是:

x = \frac{- 3 + 97}{4}, x = \frac{- 3 - 97}{4}

作图

流行的例子

3 + x < 7

- 2 (z + 11) = 6

∣ 2 x - 2 ∣ < - 8

化简 log_{2}(15)+log_{2}(4)-log_{2}(6)

s im pl i f y lo g_{2} (15) + lo g_{2} (4) - lo g_{2} (6)

化简 31/33+1/3

s im pl i f y \frac{31}{33} + \frac{1}{3}