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^3+11x^2+15x-27=0

解答

x^{3} + 11 x^{2} + 15 x - 27 = 0

解答

x = 1, x = - 3, x = - 9

求解步骤

x^{3} + 11 x^{2} + 15 x - 27 = 0

因式分解

x^{3} + 11 x^{2} + 15 x - 27 : (x - 1) (x + 3) (x + 9)

(x - 1) (x + 3) (x + 9) = 0

使用零因数法则： If

ab = 0

then

a = 0

or

b = 0

x - 1 = 0 or x + 3 = 0 or x + 9 = 0

解

x - 1 = 0 : x = 1

解

x + 3 = 0 : x = - 3

解

x + 9 = 0 : x = - 9

解为

x = 1, x = - 3, x = - 9

作图

流行的例子

(x - 1)^{3} - 8 = 0

x^5-4x^3-x^2+4=0

x^{5} - 4 x^{3} - x^{2} + 4 = 0

y^{8} + 5 = - 3

12 x - 4 = 3 x^{3} - x^{2}

x^3-7x^2+25x-39=0

x^{3} - 7 x^{2} + 25 x - 39 = 0