Date: Jan 10, 2013 1:01 AM Author: Rafael Chavez Subject: How can I know how many real roots this polynomial has? Let x^7?10x^5+15x+5 a polynomial over Q. I would like to know how many real roots this polynomial has, I know we have to use the intermediate value theorem, but I don't know how to use in this case in particular.

I need help please.

Thanks