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 >

0.022-0.22x-x^2=0

解答

0.022 - 0.22 x - x^{2} = 0

解答

x = - \frac{11 + 341}{100}, x = \frac{341 - 11}{100}

+1

十进制

x = - 0.29466 \dots, x = 0.07466 \dots

求解步骤

0.022 - 0.22 x - x^{2} = 0

在两边乘以

1000

22 - 220 x - 1000 x^{2} = 0

改写成标准形式

a x^{2} + b x + c = 0

- 1000 x^{2} - 220 x + 22 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 220 ) \pm ( - 220 ) ^{2} - 4 ( - 1000 ) \cdot 22}{2 ( - 1000 )}

(- 220)^{2} - 4 (- 1000) \cdot 22 = 20341

x_{1, 2} = \frac{- ( - 220 ) \pm 20 341}{2 ( - 1000 )}

将解分隔开

x_{1} = \frac{- ( - 220 ) + 20 341}{2 ( - 1000 )}, x_{2} = \frac{- ( - 220 ) - 20 341}{2 ( - 1000 )}

x = \frac{- ( - 220 ) + 20 341}{2 ( - 1000 )} : - \frac{11 + 341}{100}

x = \frac{- ( - 220 ) - 20 341}{2 ( - 1000 )} : \frac{341 - 11}{100}

二次方程组的解是:

x = - \frac{11 + 341}{100}, x = \frac{341 - 11}{100}

作图

流行的例子

6 n^{2} - 19 n + 10 = 0

x^2= 1/2 (30-x)^2

x^{2} = \frac{1}{2} (30 - x)^{2}

completesquare 5n^2-20n+6=0

co m pl e t es q u a re 5 n^{2} - 20 n + 6 = 0

completesquare x^2+5x-7

co m pl e t es q u a re x^{2} + 5 x - 7

completesquare x^2+5x-1

co m pl e t es q u a re x^{2} + 5 x - 1