Question

Find all zeros:

f(x)=x^3+6x^2-9x-54

Answer 1

3, -3, and -6

Answer 2

you can use the rational root theorem to try rational roots - they'll be divisible by 54. I found 3, and then factored three out (you can use synthetic division) to get a quadratic, which is easily factored.

Answer 3

Thank you!