Solution to Problem 607 | Double Integration Method

Problem 607
Determine the maximum value of EIy for the cantilever beam loaded as shown in Fig. P-607. Take the origin at the wall.
 

Cantilever Beam with Point Load

 

Solution 607

 

I have a question regarding this if x=0 and y=0 shouldt c2 have a value then ?
Because when you subtitute everything the remaining is (-pa^3)/6 therefore c2 is equal to -pa^3/6