Question

Approximate the real number solution(s) to the polynomial function f(x) = x3 + 2x2 - 5x - 6

Answer 1

answers:
x = -3, x = -1, x = 2
x = 3, x = 1, x = -2
x = 3, x = -1, x = 2
x = -3, x = 1, x = -2

Answer 2

=x^3+x^2+x^2+x-6x-6

=x^2(x+1)+x(x+1)-6(x+1)
=(x+1)(x^2+x-6)
thus x=-1,x=-3,x=2