zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的 >

x^2-11x+19=0

解答

x^{2} - 11 x + 19 = 0

解答

x = \frac{11 + 3 5}{2}, x = \frac{11 - 3 5}{2}

+1

十进制表示法

x = 8.85410 \dots, x = 2.14589 \dots

求解步骤

x^{2} - 11 x + 19 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 11 ) \pm ( - 11 ) ^{2} - 4 \cdot 1 \cdot 19}{2 \cdot 1}

(- 11)^{2} - 4 \cdot 1 \cdot 19 = 35

x_{1, 2} = \frac{- ( - 11 ) \pm 3 5}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- ( - 11 ) + 3 5}{2 \cdot 1}, x_{2} = \frac{- ( - 11 ) - 3 5}{2 \cdot 1}

x = \frac{- ( - 11 ) + 3 5}{2 \cdot 1} : \frac{11 + 3 5}{2}

x = \frac{- ( - 11 ) - 3 5}{2 \cdot 1} : \frac{11 - 3 5}{2}

二次方程组的解是:

x = \frac{11 + 3 5}{2}, x = \frac{11 - 3 5}{2}

流行的例子

(5 \cdot 2 \cdot 3)^{4}

∣ 5 x ∣ > 15

2 x - x^{2} = - x

(x + 2) (x + 2) = 1

\frac{x}{6} = 7