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 >

completesquare-3x^2-4x+2

解答

配方

- 3 x^{2} - 4 x + 2

解答

- 3 (x + \frac{2}{3})^{2} + \frac{10}{3}

求解步骤

- 3 x^{2} - 4 x + 2

将

- 3 x^{2} - 4 x + 2

改写为如下形式:

x^{2} + 2 a x + a^{2}

因式分解

- 3

- 3 (x^{2} + \frac{4 x}{3} - \frac{2}{3})

2 a = \frac{4}{3} : a = \frac{2}{3}

加和减

(\frac{2}{3})^{2}

- 3 (x^{2} + \frac{4 x}{3} - \frac{2}{3} + (\frac{2}{3})^{2} - (\frac{2}{3})^{2})

x^{2} + 2 a x + a^{2} = (x + a)^{2}

x^{2} + \frac{4}{3} x + (\frac{2}{3})^{2} = (x + \frac{2}{3})^{2}

- 3 ((x + \frac{2}{3})^{2} - \frac{2}{3} - (\frac{2}{3})^{2})

化简

- 3 (x + \frac{2}{3})^{2} + \frac{10}{3}

作图

流行的例子

4 x^{2} + 9 x - 7 = 2

9 x^{2} - 6 x = 8

4 a^{2} + 4 a + 1 = 0

6 x^{2} - 8 x + 6 = 0

solvefor y,y^2-x^2=0

so l v e f or y, y^{2} - x^{2} = 0