Question

How do you find all the zeros of the function: f(x)=x^4-x^3+2x^2-4x-8

Answer 1

@timo86m

Answer 2

Factor or graph.

Answer 3

can you show me how to factor this problem

Answer 4

factored
(x-2)*(x+1)*(x^2+4)
^ notice here you have to take negative sqrt of a the number so it is 2 imaginaries.
{x = 2}, {x = -1}, {x = 2*I}, {x = -2*I}

Answer 5

isn't x^2+4 prime?

Answer 6

Oh okay http://answers.yahoo.com/question/index?qid=20091115111403AAnQ7Zk I see what you did there :) Gracias!!!!

Answer 7

De nada :D