GRE數(shù)學重要知識點：Polynomials

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    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.