4 3 2 x + 2*x - 16*x - 2*x + 15
x^4 + 2*x^3 - 16*x^2 - 2*x + 15
1*(x + 5)*(x + 1)*(x - 1)*(x - 3)
(((1*(x + 5))*(x + 1))*(x - 1))*(x - 3)
x^4 + 2*x^3 - 16*x^2 - 2*x + 15 при x = 1
подставляем
4 3 2 x + 2*x - 16*x - 2*x + 15
4 2 3 15 + x - 16*x - 2*x + 2*x
переменные
x = 1
4 2 3 15 + (1) - 16*(1) - 2*(1) + 2*(1)
4 2 3 15 + 1 - 16*1 - 2*1 + 2*1
0
0
15.0 + x^4 + 2.0*x^3 - 2.0*x - 16.0*x^2
15.0 + x^4 + 2.0*x^3 - 2.0*x - 16.0*x^2
(1 + x)*(-1 + x)*(-3 + x)*(5 + x)
(1 + x)*(-1 + x)*(-3 + x)*(5 + x)