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+26=12x

解答

x^{2} + 26 = 12 x

解答

x = 6 + 10, x = 6 - 10

+1

十进制

x = 9.16227 \dots, x = 2.83772 \dots

求解步骤

x^{2} + 26 = 12 x

将

12 x

para o lado esquerdo

x^{2} + 26 - 12 x = 0

改写成标准形式

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

x^{2} - 12 x + 26 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 12 ) \pm ( - 12 ) ^{2} - 4 \cdot 1 \cdot 26}{2 \cdot 1}

(- 12)^{2} - 4 \cdot 1 \cdot 26 = 210

x_{1, 2} = \frac{- ( - 12 ) \pm 2 10}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- ( - 12 ) + 2 10}{2 \cdot 1}, x_{2} = \frac{- ( - 12 ) - 2 10}{2 \cdot 1}

x = \frac{- ( - 12 ) + 2 10}{2 \cdot 1} : 6 + 10

x = \frac{- ( - 12 ) - 2 10}{2 \cdot 1} : 6 - 10

二次方程组的解是:

x = 6 + 10, x = 6 - 10

作图

流行的例子

m^{2} - 3 m - 18 = 0

7 x^{2} + 5 x - 1 = 0

x^{2} - x + c = 0

3 x^{2} - 24 x + 27 = 0

3=(1-2(1)+5)t^2+(2(1)-2(1))t+1

3 = (1 - 2 (1) + 5) t^{2} + (2 (1) - 2 (1)) t + 1