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+9/8 =0

解答

2 x^{2} + 3 x + \frac{9}{8} = 0

解答

x = - \frac{3}{4}

+1

十进制

x = - 0.75

求解步骤

2 x^{2} + 3 x + \frac{9}{8} = 0

在两边乘以

8

16 x^{2} + 24 x + 9 = 0

使用求根公式求解

x_{1, 2} = \frac{- 24 \pm 2 4 ^{2} - 4 \cdot 16 \cdot 9}{2 \cdot 16}

2 4^{2} - 4 \cdot 16 \cdot 9 = 0

x_{1, 2} = \frac{- 24 \pm 0}{2 \cdot 16}

x = \frac{- 24}{2 \cdot 16}

\frac{- 24}{2 \cdot 16} = - \frac{3}{4}

x = - \frac{3}{4}

二次方程组的解是:

x = - \frac{3}{4}

作图

流行的例子

2 (x^{2} + 9) = 26

-10x+175-5x^2=0

- 10 x + 175 - 5 x^{2} = 0

192 x - 6 x^{2} = 0

4 (x - 6)^{2} - 35 = 14

n^{2} + 10 n = - 21