How do you use the rational root theorem to find the roots of #x^3 – x^2 – x – 3 = 0#?
1 Answer
The rational root theorem only helps us find that
The only Real root is:
Explanation:
Let
By the rational root theorem, any rational roots of
That means that the only possible rational roots of
Let's try them:
So
Using a simple Tschirnhaus transformation (