Question

Find all the zeros of the given polynomial. f(x)=x³ + 6x² - 3x - 18:
a. x = -3, x = -2, x = 3
b. x = -6, x = 1, x = 3
c. x = -3, x = 2, x = 3
d. x = -3, x = 1, x = 6