Question

What is the LARGEST number of real zeros a polynomial with degree n can have?

Answer 1

I'm wondering if you have studied the Fundamental Theorem of Algebra yet.

Answer 2

@cuzinit

Answer 3

Infinity.

Answer 4

Good explain: Taylor series of sin x

Answer 5

@cuzinit
The Fundamental Theorem of Algebra (FTA) states
Every polynomial equation of degree n with complex coefficients has n roots in the complex numbers.

Read about the history of the theorem at the following link:
http://www-history.mcs.st-and.ac.uk/HistTopics/Fund_theorem_of_algebra.html