Atar notes mathematics topic test book thing

[jenae.madden]

Hiya, I am looking at Topic XII - Integration - solutions for test 1 - Question 1 b.
and in the working out in the 3rd line of working out it states
= - (3/2) (-x^-1) + C
     and then 4th line states
= (3/2) (1/x) + C
      I was just wondering what happened to the minus from lines 3 to 4.
Sorry if its silly im just v confused
Thank you!

[NowYouTseMe]

x^-1 is equal to 1/x, so -x^-1 is equal to -1/x
between the 3rd and 4th line, the solution just took the negative sign out of the (-x^-1), making the entire thing positive