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 >

3(2x^2+7)=-87

解答

3 (2 x^{2} + 7) = - 87

解答

x = 2 \cdot 3 i, x = - 2 \cdot 3 i

求解步骤

3 (2 x^{2} + 7) = - 87

两边除以

3

2 x^{2} + 7 = - 29

将

7

到右边

2 x^{2} = - 36

两边除以

2

x^{2} = - 18

对于

x^{2} = f (a)

解为

x = f (a), - f (a)

x = - 18, x = - - 18

- 18 = 2 \cdot 3 i

- - 18 = - 2 \cdot 3 i

x = 2 \cdot 3 i, x = - 2 \cdot 3 i

作图

流行的例子

y^{2} - 7 y = 0

d^{2} - 5 d - 14 = 0

completesquare x^2-6x+16

co m pl e t es q u a re x^{2} - 6 x + 16

completesquare x^2+6x-3

co m pl e t es q u a re x^{2} + 6 x - 3

w^{2} - 14 w + 42 = 0