How do you use the rational root theorem to find the roots of #3x^3 + 3x^2-2x + 15 = 0#?

1 Answer
Dec 9, 2015

Answer:

You can't find rational roots of that equation. It has no rational roots.

Explanation:

Using the rational roots theorem, we see that the only possible rational roots of

#3x^3 + 3x^2-2x + 15 = 0#

Are #+-1, +-3, +-5, +-1/3, +-5/3#

Testing these possibilities we find that none of them are roots.