GRE数学重要知识点：Polynomials

　　Any expression with one or more terms is called polynomial.

　　Example:

　　3x+2,4x2-x+2,and 4x+3xy+y2are all polynomials.

　　(3x+5/(2x+y))and sin(3x+2) are not polynomials.

　　Remember:

　　Order of a polynomial is the highest power of any variable.

　　The highest power in an n-th order polynomial is n.

　　Both monomials and binomials are polynomials of order 1 and 2,
respectively.