Answer:
80
Step-by-step explanation:
The square of a binomial is ...
(a +b)^2 = a^2 + 2ab + b^2
You have a=8q, b=5, so the square is ...
(8q)^2 + 2(8q)(5) + (5)^2
= 64q^2 +80q +25
The coefficient missing from your given expression is 80.
