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=13+6x

解答

x^{2} = 13 + 6 x

解答

x = 3 + 22, x = 3 - 22

+1

十进制

x = 7.69041 \dots, x = - 1.69041 \dots

求解步骤

x^{2} = 13 + 6 x

将

6 x

para o lado esquerdo

x^{2} - 6 x = 13

将

13

para o lado esquerdo

x^{2} - 6 x - 13 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 6 ) \pm ( - 6 ) ^{2} - 4 \cdot 1 \cdot ( - 13 )}{2 \cdot 1}

(- 6)^{2} - 4 \cdot 1 \cdot (- 13) = 222

x_{1, 2} = \frac{- ( - 6 ) \pm 2 22}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- ( - 6 ) + 2 22}{2 \cdot 1}, x_{2} = \frac{- ( - 6 ) - 2 22}{2 \cdot 1}

x = \frac{- ( - 6 ) + 2 22}{2 \cdot 1} : 3 + 22

x = \frac{- ( - 6 ) - 2 22}{2 \cdot 1} : 3 - 22

二次方程组的解是:

x = 3 + 22, x = 3 - 22

作图

流行的例子

{6+[9-(-5+10)+(7-3)]+[(-3)-(-12)+13]}

{6 + [9 - (- 5 + 10) + (7 - 3)] + [(- 3) - (- 12) + 13]}

化简 1/(2+\frac{1){1+1/2}}

s im pl i f y \frac{1}{2 + \frac{1}{1 + \frac{1}{2}}}

8 = 14 n

化简-(7)^{-2}

s im pl i f y - (7)^{- 2}

2 x^{2} + 3 x - 2 > 0