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the discriminant is used in order to find...
how many x-ints there are
+ discriminant=2 x-ints
- discriminant= 0 x-ints
when discriminant=0, there is one x-int, which is also the vertex
*b/c you can't sq root a negative number, and root 0 is 0, but root any positive number will have both a positive and negative root
How can one identify a quadratic formula?
The second difference: after finding the difference between each term, find the difference between those differences. If that value is a constant number, then we have the second difference, and the formula is quadratic.
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