Answer:
work is shown and pictured
General vertex form:

Given :

Extract "spread factor" m

Complete the square


Write as a squared binomial and simplify the constant

Re-write to match signs of standard general form:

60,000 would be the answer because it stays the same if under 5 it stays if above 5 rounds up once
The Quotient would be 1012 so I would just put 1000 if your supposed to estimate.