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 >

3x^2-36x+108=9

解答

3 x^{2} - 36 x + 108 = 9

解答

x = 6 + 3, x = 6 - 3

+1

十进制

x = 7.73205 \dots, x = 4.26794 \dots

求解步骤

3 x^{2} - 36 x + 108 = 9

将

9

para o lado esquerdo

3 x^{2} - 36 x + 99 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 36 ) \pm ( - 36 ) ^{2} - 4 \cdot 3 \cdot 99}{2 \cdot 3}

(- 36)^{2} - 4 \cdot 3 \cdot 99 = 63

x_{1, 2} = \frac{- ( - 36 ) \pm 6 3}{2 \cdot 3}

将解分隔开

x_{1} = \frac{- ( - 36 ) + 6 3}{2 \cdot 3}, x_{2} = \frac{- ( - 36 ) - 6 3}{2 \cdot 3}

x = \frac{- ( - 36 ) + 6 3}{2 \cdot 3} : 6 + 3

x = \frac{- ( - 36 ) - 6 3}{2 \cdot 3} : 6 - 3

二次方程组的解是:

x = 6 + 3, x = 6 - 3

作图

流行的例子

z^{2} - 7 z + 2 = 0

16 = - x^{2} - 6 x

3 (x - 1)^{2} = 75

quadraticformula x^2+x-20=0

q u a d r a t i c f or m u l a x^{2} + x - 20 = 0

3/5 (3p^2-12p-10)=0

\frac{3}{5} (3 p^{2} - 12 p - 10) = 0