Question 1143551
I know bc it is negative -5x^2 it opens downward, so it is a maximum value. I thinking that part is right??? 
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y = -5x^2 does have a maximum.
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I'm confused on how to find the value 
I could really use some help. 

I put in a & b into x= -b/ 2a
The max is at x = -b/2a
b = 0
--->  max at x = 0
----> the point (0,0) is the max.
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But I'm just not sure if that's what I'm supposed to use to get the answer