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 >

a^2+10a+18=9

解答

a^{2} + 10 a + 18 = 9

解答

a = - 1, a = - 9

求解步骤

a^{2} + 10 a + 18 = 9

将

9

para o lado esquerdo

a^{2} + 10 a + 9 = 0

使用求根公式求解

a_{1, 2} = \frac{- 10 \pm 1 0 ^{2} - 4 \cdot 1 \cdot 9}{2 \cdot 1}

1 0^{2} - 4 \cdot 1 \cdot 9 = 8

a_{1, 2} = \frac{- 10 \pm 8}{2 \cdot 1}

将解分隔开

a_{1} = \frac{- 10 + 8}{2 \cdot 1}, a_{2} = \frac{- 10 - 8}{2 \cdot 1}

a = \frac{- 10 + 8}{2 \cdot 1} : - 1

a = \frac{- 10 - 8}{2 \cdot 1} : - 9

二次方程组的解是:

a = - 1, a = - 9

作图

流行的例子

x^{2} - 2 = - x

x^2-(3a+2b)x+6ab=0

x^{2} - (3 a + 2 b) x + 6 ab = 0

x^{2} - 8 x + 16 = 49

5 x^{2} - 10 x - 35 = 0

x^{2} - 28 = - 3 x