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+14x=-43

解答

x^{2} + 14 x = - 43

解答

x = - 7 + 6, x = - 7 - 6

+1

十进制

x = - 4.55051 \dots, x = - 9.44948 \dots

求解步骤

x^{2} + 14 x = - 43

将

43

para o lado esquerdo

x^{2} + 14 x + 43 = 0

使用求根公式求解

x_{1, 2} = \frac{- 14 \pm 1 4 ^{2} - 4 \cdot 1 \cdot 43}{2 \cdot 1}

1 4^{2} - 4 \cdot 1 \cdot 43 = 26

x_{1, 2} = \frac{- 14 \pm 2 6}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- 14 + 2 6}{2 \cdot 1}, x_{2} = \frac{- 14 - 2 6}{2 \cdot 1}

x = \frac{- 14 + 2 6}{2 \cdot 1} : - 7 + 6

x = \frac{- 14 - 2 6}{2 \cdot 1} : - 7 - 6

二次方程组的解是:

x = - 7 + 6, x = - 7 - 6

作图

流行的例子

m^{2} - 6 m - 55 = 0

3 x^{2} + 21 x + 3 = 7 x

r^{2} + 3 r = 1

completesquare-2x^2+4x

co m pl e t es q u a re - 2 x^{2} + 4 x

(3-x)^2=(1+2x)^2

(3 - x)^{2} = (1 + 2 x)^{2}