(追記) (追記ここまで)
Polynomial
The sum or difference of terms which have variables raised to positive integer powers and which have coefficients that may be real or complex.
The following are all polynomials: 5x3 – 2x2 + x – 13, x2y3 + xy, and (1 + i)a2 + ib2.
Note: Even though the prefix poly- means many, we use the word polynomial to refer to polynomials with 1 term (monomials), 2 terms (binomials), 3 terms, (trinomials), etc.
Standard form for a polynomial in one variable:
anxn + an–1xn–1 + ··· + a2x2 + a1x + a0
See also