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 x^2-1/5 x-6

解答

配方

x^{2} - \frac{1}{5} x - 6

解答

(x - \frac{1}{10})^{2} - \frac{601}{100}

求解步骤

x^{2} - \frac{1}{5} x - 6

改写成标准形式

a x^{2} + b x + c

x^{2} - \frac{x}{5} - 6

将

x^{2} - \frac{x}{5} - 6

改写为如下形式:

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

2 a = - \frac{1}{5} : a = - \frac{1}{10}

加和减

(- \frac{1}{10})^{2}

x^{2} - \frac{x}{5} - 6 + (- \frac{1}{10})^{2} - (- \frac{1}{10})^{2}

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

x^{2} - \frac{1}{5} x + (- \frac{1}{10})^{2} = (x - \frac{1}{10})^{2}

(x - \frac{1}{10})^{2} - 6 - (- \frac{1}{10})^{2}

化简

(x - \frac{1}{10})^{2} - \frac{601}{100}

作图

流行的例子

x^{2} - 13 = 4 x

3 x^{2} = - 1

X^{2} - 36 = 0

4x^2-2(x-1/3)= 4/3 x

4 x^{2} - 2 (x - \frac{1}{3}) = \frac{4}{3} x

5 x^{2} + 17 x - 12 = 0