Chapter 4 - Polynomial and Rational Functions - 4.6 Complex Zeros; Fundamental Theorem of Algebra - 4.6 Assess Your Understanding - Page 240: 5

True.

It is the result of the Fundamental Theorem of Algebra and the Factor Theorem, hence it is true. The fundamental theorem of algebra says that every non-constant single-variable polynomial with complex coefficients has at least a complex root. The factor theorem says that if $f(c)=0$, then $(x-c)$ is a factor of $f(x)$ and vice versa.