Polynomials are expressions like $15x^3 - 14x^2 + 8$. Questions tagged with this concern common operations on polynomials, like adding, multiplying, polynomial long division, factoring and solving for roots.

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Help with Proof explanation

I need help in understanding a (topological) proof of Fundamental theorem of algebra. Here is the Proof: Suppose $f(z)=a_nz^n+...+a_0$ with $a_0 \neq 0, n \geq1.$ WLOG, assume that $a_n=1.$ We ...