Question

(6a + b) ^2 + (product)

Answer 1

This is a distributive problem in mathematics.
So you do the first term, then second term in the parenthesis normally. Since it has a square (or to the power of two) you do this:

(6a+b)(6a+b)

First term
6a x 6a = 36a^2
6a x b = 6ab
Now second term
b x 6a = 6ab
b x b = b^2

simplify terms:

36a^2 + b^2 + 12ab