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 >

x^2-8x+16=8

解答

x^{2} - 8 x + 16 = 8

解答

x = 2 (2 + 2), x = 2 (2 - 2)

+1

十进制

x = 6.82842 \dots, x = 1.17157 \dots

求解步骤

x^{2} - 8 x + 16 = 8

将

8

para o lado esquerdo

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

使用求根公式求解

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

(- 8)^{2} - 4 \cdot 1 \cdot 8 = 42

x_{1, 2} = \frac{- ( - 8 ) \pm 4 2}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- ( - 8 ) + 4 2}{2 \cdot 1}, x_{2} = \frac{- ( - 8 ) - 4 2}{2 \cdot 1}

x = \frac{- ( - 8 ) + 4 2}{2 \cdot 1} : 2 (2 + 2)

x = \frac{- ( - 8 ) - 4 2}{2 \cdot 1} : 2 (2 - 2)

二次方程组的解是:

x = 2 (2 + 2), x = 2 (2 - 2)

作图

流行的例子

10 x^{2} - 10 = 0

sqrt(3)x^2+sqrt(5)x-2sqrt(3)=0

3 x^{2} + 5 x - 23 = 0

completesquare x^2-5x-6=0

co m pl e t es q u a re x^{2} - 5 x - 6 = 0

8y^2+128y-512=0

8 y^{2} + 128 y - 512 = 0

8 x = 5 + 2 x^{2}