Question

(8q+5)^2=64q^2+[]q+25
What is the missing value? []

Answer 1

80

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.