ja

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

人気のある代数 >

7x^2-14x+1=0

解

7 x^{2} - 14 x + 1 = 0

解

x = \frac{7 + 42}{7}, x = \frac{7 - 42}{7}

+1

十進法表記

x = 1.92582 \dots, x = 0.07417 \dots

解答ステップ

7 x^{2} - 14 x + 1 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 14 ) \pm ( - 14 ) ^{2} - 4 \cdot 7 \cdot 1}{2 \cdot 7}

(- 14)^{2} - 4 \cdot 7 \cdot 1 = 242

x_{1, 2} = \frac{- ( - 14 ) \pm 2 42}{2 \cdot 7}

解を分離する

x_{1} = \frac{- ( - 14 ) + 2 42}{2 \cdot 7}, x_{2} = \frac{- ( - 14 ) - 2 42}{2 \cdot 7}

x = \frac{- ( - 14 ) + 2 42}{2 \cdot 7} : \frac{7 + 42}{7}

x = \frac{- ( - 14 ) - 2 42}{2 \cdot 7} : \frac{7 - 42}{7}

二次equationの解:

x = \frac{7 + 42}{7}, x = \frac{7 - 42}{7}

グラフ

人気の例

a x^{2} - ab x = 0

0.022-0.22x-x^2=0

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

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