This trinomial fully factored is 2(6p + 5q)(6p + 5q)
Answer = 5(x+1)^2 -21
5 {x^2 + 2x } - 16
5 {(x+1)^2 -1 } - 16
5(x+1)^2 -5 - 16
5(x+1)^2 -21
First, you want to even out each side.

You need to inverse -q to +q and add to both sides to get

Now you need to do the oppisite of add to 11 which is subtract it from both sides.

or
It’s C, because a square has 4 sides so you divide 25 by 4 and get 5