SOLUTION: Hi, I would like to know why is 2x3+6x-1 is not a quadratic funtion

Question 24915: Hi,
I would like to know why is 2x3+6x-1 is not a quadratic funtion
Answer by kev82(151) (Show Source): You can put this solution on YOUR website!
Hi,
This is polynomial. Put simply, a polynomial is when you take different (non-negative integer) powers of x, and add lots of them together. One way of grouping polynomials is by their highest power of x. In your example the highest power of x is 3, and this is called a cubic polynomial.
A quadratic is a polynomial where the highest power of x is 2. So for a polynomial to be quadratic the highest power of x must be exactly 2.
Hope that helps
Kev.
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