SOLUTION: how do you figure out the height of the max/min when drawin a quadratic parobola??? for example (x+5)(x-3)

Question 350830: how do you figure out the height of the max/min when drawin a quadratic parobola???
for example (x+5)(x-3)
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Convert to vertex form, .
The max or min occurs at the vertex, min if , max if .
Using your example,

Use the FOIL method to expand,

Complete the square to get into vertex form,

So the vertex occurs at (,).
Since , the parabola opens upward and the vertex value is a minimum.

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