A real polynomial is a polynomial having only real numbers as coefficients. Every nonzero real univariate polynomial is a nonzero constant times a product of irreducible polynomials of polynomial degree 1 or 2.
Real Polynomial
See also
PolynomialExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Real Polynomial." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/RealPolynomial.html