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Unformatted text preview: polynomial.
Note that we will often drop the “in one variable” part and just say polynomial.
Here are examples of polynomials and their degrees. 5 x12  2 x 6 + x5  198 x + 1 degree : 12 x4  x3 + x2  x + 1 degree : 4 23 56 x
5x  7
8 degree : 23
degree : 1
degree : 0 So, a polynomial doesn’t have to contain all powers of x as we see in the first example. Also,
polynomials can consist of a single term as we see in the third and fifth example.
We should probably discuss the final example a little more. This really is a polynomial even it
may not look like one. Remember that a polynomial is any algebraic expression that consists of
terms in the form ax n . Another way to write the last example is 8 x 0
Written in this way makes it clear that the exponent on the x is a zero (this also explains the
degree…) and so we can see that it really is a polynomial in one variable.
Here are some examples of things that aren’t polynomials. 4 x 6 + 15 x 8 + 1
5 x  x + x2
23
+ x 2
x
The first one isn’t a polynom...
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 Spring '12
 MrVinh

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