To express the equation of a parabola in vertex form we must complete squares. The equation is given as
The first step is to factor 5 and leave space to complete the third term in the parentheses, along with a space outside it to compensate. This should look like
Those spaces need to be filled out like shown in the step 2. Thus the correct option is D
If she completes 1/4 of a page in an hour completing one page will take her 4 hours after that you multiply it by 3 and get the total of 12 hours that is takes for her to do her homework