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 >

x^2-6x-3=0

解答

x^{2} - 6 x - 3 = 0

解答

x = 3 + 23, x = 3 - 23

+1

十进制

x = 6.46410 \dots, x = - 0.46410 \dots

求解步骤

x^{2} - 6 x - 3 = 0

使用求根公式求解

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

(- 6)^{2} - 4 \cdot 1 \cdot (- 3) = 43

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

将解分隔开

x_{1} = \frac{- ( - 6 ) + 4 3}{2 \cdot 1}, x_{2} = \frac{- ( - 6 ) - 4 3}{2 \cdot 1}

x = \frac{- ( - 6 ) + 4 3}{2 \cdot 1} : 3 + 23

x = \frac{- ( - 6 ) - 4 3}{2 \cdot 1} : 3 - 23

二次方程组的解是:

x = 3 + 23, x = 3 - 23

作图

流行的例子

化简 (2(4/3))/(1-(4/3)^2)

s im pl i f y \frac{2 ( \frac{4}{3} )}{1 - ( \frac{4}{3} ) ^{2}}

s im pl i f y \frac{1}{3} + 4

x^{2} + 484 = 0

s im pl i f y 2. 8^{2}

(0.00019)/(1.25)= x/(0.75)

\frac{0.00019}{1.25} = \frac{x}{0.75}