Question

решите уравнение: x^3+x^2 -x-1

Answer 1

3х+2х-х-1=5х-х-1=4х-1

Answer 2

x^3+x^2 -x-1 = 0
х3 + х2 -х-1 = (х-1)(х+1)2
х2 + 2х +1 = 0
Д = 2^2 - 4 = 0
х = -2+-0/2
х = 1
х= -1