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 >

8/3 =8x-4x^2

解答

\frac{8}{3} = 8 x - 4 x^{2}

解答

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

+1

十进制

x = 0.42264 \dots, x = 1.57735 \dots

求解步骤

\frac{8}{3} = 8 x - 4 x^{2}

在两边乘以

3

8 = 24 x - 12 x^{2}

交换两边

24 x - 12 x^{2} = 8

将

8

para o lado esquerdo

24 x - 12 x^{2} - 8 = 0

改写成标准形式

a x^{2} + b x + c = 0

- 12 x^{2} + 24 x - 8 = 0

使用求根公式求解

x_{1, 2} = \frac{- 24 \pm 2 4 ^{2} - 4 ( - 12 ) ( - 8 )}{2 ( - 12 )}

2 4^{2} - 4 (- 12) (- 8) = 83

x_{1, 2} = \frac{- 24 \pm 8 3}{2 ( - 12 )}

将解分隔开

x_{1} = \frac{- 24 + 8 3}{2 ( - 12 )}, x_{2} = \frac{- 24 - 8 3}{2 ( - 12 )}

x = \frac{- 24 + 8 3}{2 ( - 12 )} : \frac{3 - 3}{3}

x = \frac{- 24 - 8 3}{2 ( - 12 )} : \frac{3 + 3}{3}

二次方程组的解是:

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

作图

流行的例子

50 x + 6 > - 94

y^{2} + 8 y + 16 = 0

3 \leq ∣ 3 y - 6 ∣ \leq 9

2(3x-5)+3x+3=20

2 (3 x - 5) + 3 x + 3 = 20

3 (x - 2) = 2 x + x - 6