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=-x^2+18x

解答

x^{2} = - x^{2} + 18 x

解答

x = 0, x = 9

求解步骤

x^{2} = - x^{2} + 18 x

交换两边

- x^{2} + 18 x = x^{2}

将

x^{2}

para o lado esquerdo

- 2 x^{2} + 18 x = 0

使用求根公式求解

x_{1, 2} = \frac{- 18 \pm 1 8 ^{2} - 4 ( - 2 ) \cdot 0}{2 ( - 2 )}

1 8^{2} - 4 (- 2) \cdot 0 = 18

x_{1, 2} = \frac{- 18 \pm 18}{2 ( - 2 )}

将解分隔开

x_{1} = \frac{- 18 + 18}{2 ( - 2 )}, x_{2} = \frac{- 18 - 18}{2 ( - 2 )}

x = \frac{- 18 + 18}{2 ( - 2 )} : 0

x = \frac{- 18 - 18}{2 ( - 2 )} : 9

二次方程组的解是:

x = 0, x = 9

作图

流行的例子

0 = 12 x^{2} - 48 x + 36

6 x^{2} - 7 x = 0

y^{2} + 5 y - 36 = 0

(x + 1) (x + 5) = 32

(1.489-2.48I)^2+(1.49-2.48I)^2=0

(1.489 - 2.48 I)^{2} + (1.49 - 2.48 I)^{2} = 0