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 >

0=x^2+3x-3

解答

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

解答

x = \frac{- 3 + 21}{2}, x = \frac{- 3 - 21}{2}

+1

十进制

x = 0.79128 \dots, x = - 3.79128 \dots

求解步骤

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

交换两边

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

使用求根公式求解

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

3^{2} - 4 \cdot 1 \cdot (- 3) = 21

x_{1, 2} = \frac{- 3 \pm 21}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- 3 + 21}{2 \cdot 1}, x_{2} = \frac{- 3 - 21}{2 \cdot 1}

x = \frac{- 3 + 21}{2 \cdot 1} : \frac{- 3 + 21}{2}

x = \frac{- 3 - 21}{2 \cdot 1} : \frac{- 3 - 21}{2}

二次方程组的解是:

x = \frac{- 3 + 21}{2}, x = \frac{- 3 - 21}{2}

作图

流行的例子

0 = x^{2} + 3 x + 5

2 - 3 x^{2} - 12 x = - 5 x

3 x^{2} = 10 x - 3

9 x^{2} + 22 x - 1 = 0

x/b*(3x)/7 =2.3

\frac{x}{b} \cdot \frac{3 x}{7} = 2.3