For the given quadratic equation we only have a maximum at y = 18.
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How to find the extrema of the given function?</h3>
Here we have:
Notice that this is a quadratic equation of negative leading coefficient.
Then we have a maximum at the vertex, and both arms tend to negative infinity as x tends to infinity or negative infinity.
The vertex is at:
x = -(-4)/(2*(-2)) = -1
The maximum is:
If you want to learn more about quadratic equations:
brainly.com/question/1214333
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2
2 + 2 = 4
4 + 4 = 8
8 + 8 = 16
Area = 1/2 x perimeter x apothem