Answer:
78.54
Step-by-step explanation:
the answer is 5.411.
https://youtu.be/MdthGCQfC0o
this is a link to a video about subtracting decimals simply
(0, - 1) maximum
The vertex is the turning point of the graph.
That is vertex = (0, - 1 )
Since the graph opens down then it is a maximum