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 >

30x-4x^2-2x^3=0

解答

30 x - 4 x^{2} - 2 x^{3} = 0

解答

x = 0, x = 3, x = - 5

求解步骤

30 x - 4 x^{2} - 2 x^{3} = 0

因式分解

30 x - 4 x^{2} - 2 x^{3} : - 2 x (x - 3) (x + 5)

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

使用零因数法则： If

ab = 0

then

a = 0

or

b = 0

x = 0 or x - 3 = 0 or x + 5 = 0

解

x - 3 = 0 : x = 3

解

x + 5 = 0 : x = - 5

解为

x = 0, x = 3, x = - 5

作图

流行的例子

-λ^3+5λ^2-3λ-9=0

- λ^{3} + 5 λ^{2} - 3 λ - 9 = 0

200x^3+2000x-1000=0

200 x^{3} + 2000 x - 1000 = 0

x^3-6x^2-25x+150=0

x^{3} - 6 x^{2} - 25 x + 150 = 0

x^{4} - 19 x^{2} + 90 = 0

x^{3} - 5 x^{2} = - 6 x