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 >

-3x^2+12x+429=0

解答

- 3 x^{2} + 12 x + 429 = 0

解答

x = 2 - 73, x = 2 + 73

+1

十进制

x = - 10.12435 \dots, x = 14.12435 \dots

求解步骤

- 3 x^{2} + 12 x + 429 = 0

使用求根公式求解

x_{1, 2} = \frac{- 12 \pm 1 2 ^{2} - 4 ( - 3 ) \cdot 429}{2 ( - 3 )}

1 2^{2} - 4 (- 3) \cdot 429 = 423

x_{1, 2} = \frac{- 12 \pm 42 3}{2 ( - 3 )}

将解分隔开

x_{1} = \frac{- 12 + 42 3}{2 ( - 3 )}, x_{2} = \frac{- 12 - 42 3}{2 ( - 3 )}

x = \frac{- 12 + 42 3}{2 ( - 3 )} : 2 - 73

x = \frac{- 12 - 42 3}{2 ( - 3 )} : 2 + 73

二次方程组的解是:

x = 2 - 73, x = 2 + 73

作图

流行的例子

4 (x - 2)^{2} = - 1

2 x^{2} = 22

2 x^{2} = 7 x

3 x^{2} - 30 x - 72 = 0

2 x^{2} - 17 x + 30 = 0