Question

Решите уравнение (3-х) (9+3х+х^2)-2х+х^3=0

Answer 1

(3-x)(9+3x+x^2)=3^3-x^3=27-x^3

27-x^3-2x+x^3=0
27-2x=0
-2x= -27
x=13.5