Question

function roots!?

Answer 1

\[f(x)=6x^4 + 22x^3 + 11x^2 -38x - 40\]
i have to find all real zeros for it, i know there should be 4, but how do i narrow down the roots from the possible roots?

Answer 2

Actually, there are only 2 real roots of this guy. Do you do synthetic division?

Answer 3

actually yes i did and found the two real roots, however my book on another question has a two complex roots, so how do i find the one on it?

Answer 4

Once you're down to a quadratic, the last two roots can be found using the quadratic formula.

Answer 5

oh ok. thanks @NoelGreco