Question 1084205: how can i explain if the equation is not a quadratic
Answer by MathLover1(20849)   (Show Source):
You can put this solution on YOUR website!
by DEFINITION, quadratic equation is an equation of the form:
 where  ,  and  be real numbers, with 
So, to check if an equation is a quadratic equation,you want to make two passes through it (both sides):
-Does it have an  term appearing somewhere? If not, then it's  a quadratic equation.
Note: it can have lots of terms! The only other two term types that are allowed are  terms and constants terms.
(For example: no  terms,  variables  square roots, variables in  , and so on.)
So, sweep across the equation and look for   than terms and  terms.
If you find any, then it's a quadratic equation.
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