Every odd degree polynomial with real coefficient has at least one real root, that i can prove. but i dont know how to prove that every odd degree polynomial with rational coefficients has at least one rational root?
closed as off-topic by Jack D'Aurizio, Shailesh, Daniel W. Farlow, M. Vinay, user228113 Jun 9 '16 at 1:45
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – Jack D'Aurizio, Shailesh, Daniel W. Farlow