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 >

5x^2-10x-12=0

解答

5 x^{2} - 10 x - 12 = 0

解答

x = \frac{5 + 85}{5}, x = \frac{5 - 85}{5}

+1

十进制

x = 2.84390 \dots, x = - 0.84390 \dots

求解步骤

5 x^{2} - 10 x - 12 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 10 ) \pm ( - 10 ) ^{2} - 4 \cdot 5 ( - 12 )}{2 \cdot 5}

(- 10)^{2} - 4 \cdot 5 (- 12) = 285

x_{1, 2} = \frac{- ( - 10 ) \pm 2 85}{2 \cdot 5}

将解分隔开

x_{1} = \frac{- ( - 10 ) + 2 85}{2 \cdot 5}, x_{2} = \frac{- ( - 10 ) - 2 85}{2 \cdot 5}

x = \frac{- ( - 10 ) + 2 85}{2 \cdot 5} : \frac{5 + 85}{5}

x = \frac{- ( - 10 ) - 2 85}{2 \cdot 5} : \frac{5 - 85}{5}

二次方程组的解是:

x = \frac{5 + 85}{5}, x = \frac{5 - 85}{5}

作图

流行的例子

1 2^{2} + x^{2} = 1 4^{2}

- 4 x^{2} = 48

quadraticformula 5x^2-2x-3=0

q u a d r a t i c f or m u l a 5 x^{2} - 2 x - 3 = 0

c(x)=2x^2-18x+680

c (x) = 2 x^{2} - 18 x + 680

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