00:01
This problem sets several graphs to the quadratic function, a x squared plus b x plus c, are shown below, which is not shown below, we'll get that in a second.
00:08
For the given restrictions on a, b, c, select the corresponding graph from the choices a through f, and hint you use the discriminant.
00:14
I can't see the choices for the graphs, but i can give you, basically what you need to know for the discriminate as far as what to look at for the graphs to match up to.
00:23
If the discriminate, which is the value under the square root, when you're doing a quadratic formula, which is negative, negative b plus or minus the square root of b squared minus 4ac over 2a this expression tells you how many zeros you have and what type of zeros you have if your discriminant is equal to zero that means you have one real zero so those would be graphs that are attached to the x -axis with one point so these would be examples of discriminates equal to zero if b squared minus 4 ac is great in zero in other words it's a positive value underneath that square roots.
01:06
That means you have two real zeros.
01:09
So you'll have a graph that's going through two points for your parabola for a quadratic.
01:14
So it could look something like that...