Question

решите урввнение2х^3 + 4х^2 = 8(х+2)

Answer 1

2x^3 + 4x^2 - 8(x + 2) = 0 
2x^2 (x + 2) - 8(x + 2) = 0 
(2x^2 - 8)( x + 2) = 0 

2x^2 - 8 = 0 /:2
x^2 - 4 = 0 
x^2 = 4 
x = ±√4
x = ±2

x + 2 = 0 
x = - 2 

Ответ
- 2; 2