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=3x^2-x-10

解答

0 = 3 x^{2} - x - 10

解答

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

+1

十进制

x = 2, x = - 1.66666 \dots

求解步骤

0 = 3 x^{2} - x - 10

交换两边

3 x^{2} - x - 10 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 1 ) \pm ( - 1 ) ^{2} - 4 \cdot 3 ( - 10 )}{2 \cdot 3}

(- 1)^{2} - 4 \cdot 3 (- 10) = 11

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

将解分隔开

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

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

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

二次方程组的解是:

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

作图

流行的例子

6 (3 x + 9) - 8 x \leq - 6

化简 (x+iy-1)/(x+iy+1)

s im pl i f y \frac{x + i y - 1}{x + i y + 1}

3 + \frac{1}{2} - \frac{3}{4}

x^2+11x+121/4 = 125/4

x^{2} + 11 x + \frac{121}{4} = \frac{125}{4}

因式分解 ab+ac

f a c t or ab + a c