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+36x=0

解答

- 2 x^{2} + 36 x = 0

解答

x = 0, x = 18

求解步骤

- 2 x^{2} + 36 x = 0

使用求根公式求解

x_{1, 2} = \frac{- 36 \pm 3 6 ^{2} - 4 ( - 2 ) \cdot 0}{2 ( - 2 )}

3 6^{2} - 4 (- 2) \cdot 0 = 36

x_{1, 2} = \frac{- 36 \pm 36}{2 ( - 2 )}

将解分隔开

x_{1} = \frac{- 36 + 36}{2 ( - 2 )}, x_{2} = \frac{- 36 - 36}{2 ( - 2 )}

x = \frac{- 36 + 36}{2 ( - 2 )} : 0

x = \frac{- 36 - 36}{2 ( - 2 )} : 18

二次方程组的解是:

x = 0, x = 18

作图

流行的例子

k^{2} - 2 k - 15 = 0

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

2 = x^{2} + x

2 x^{2} - 10 x + 13 = 0

x^{2} = 2.25