@@albertdavid It's not 11.7824. See: www.symbolab.com/solver/step-by-step/%5Cfrac%7B%5Cleft%5B-1.2%20-%20%5Cleft(%5Cleft(%5Cfrac%7B1%7D%7B2%7D%5Cright)%5Cleft(-9.81%5Cright)%5Cleft(2.5%5Cright)%5E%7B2%7D%5Cright)%5Cright%5D%7D%7B2.5%7D?or=input or wolfreealpha.gitlab.io/input/?i=%5B-1.2+-+%281%2F2%28-9.81%29%282.5%29%5E2%29%5D%2F2.5
It's 50/2.5 = 20. There isn't a step to show there, we are just simplifying. So if the equation was 4=8xy, then we can write 1=2xy. We divided both sides by 4. Same thing here. Hope that helps!