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A polynomial is an expression of the form

f(x) = a_{n}x^{n },a_{n−1}x^{n−1}, a_{n − 2}x^{n−2}_{ }_{,......,+ }a_{1}x_{ + }a_{0 }where *n* is a positive integer and a_{0},a_{1}, a_{2,......,}a_{n }are constants (real numbers). In the above polynomial a_{n}x^{n },a_{n−1}x^{n−1}, a_{n − 2}x^{n−2}_{ }_{,......,}a_{0 }are known as the terms of the polynomial and a_{n}^{ },a_{n−1}, a_{n − 2}_{ }_{,......,}a_{0 }are their respective co-efficients. e.g .,

5x^{3} − 4x^{2} + x − √2 is a polynomial in the variable *x*.

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