Answer:
65
Step-by-step explanation:
let's place 9 in place of p and 4 in place of q. I will use a star in place of that symbol for the sake of my convenience having to look for it, apologies.
9^2-4^2=65
18
50-32=18
5 x y + 5 x + 4 y + 4
5x(y+1)+4(y+1)
(y+1)(5x+4)
