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

[Karthik]

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

a. x = −3, x = −1, x = 2
b. x = 3, x = 1, x = −2
c.x = 3, x = −1, x = 2
d.x = −3, x = 1, x = −2