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 >

8x^2-29x=12

解答

8 x^{2} - 29 x = 12

解答

x = 4, x = - \frac{3}{8}

+1

十进制

x = 4, x = - 0.375

求解步骤

8 x^{2} - 29 x = 12

将

12

para o lado esquerdo

8 x^{2} - 29 x - 12 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 29 ) \pm ( - 29 ) ^{2} - 4 \cdot 8 ( - 12 )}{2 \cdot 8}

(- 29)^{2} - 4 \cdot 8 (- 12) = 35

x_{1, 2} = \frac{- ( - 29 ) \pm 35}{2 \cdot 8}

将解分隔开

x_{1} = \frac{- ( - 29 ) + 35}{2 \cdot 8}, x_{2} = \frac{- ( - 29 ) - 35}{2 \cdot 8}

x = \frac{- ( - 29 ) + 35}{2 \cdot 8} : 4

x = \frac{- ( - 29 ) - 35}{2 \cdot 8} : - \frac{3}{8}

二次方程组的解是:

x = 4, x = - \frac{3}{8}

作图

流行的例子

a^{2} + 6^{2} = 1 2^{2}

a = a^{2}

81 x^{2} = 49

2 n^{2} = 10 n + 48

3 x^{2} + x = - 9