Answer:
#1. (6n) to the second power = (6^2) * (n^2)
n^2 means n to the second power, by the way
#2. (1+7n) to the second power = 1+14n+49n^2
Step-by-step explanation: You would just seperated square for the first one, since it involves the multiplication of squares, which is the same as squaring the product.
For the second one, you would expand the product to a^2+2ab+b^2, which is the same as 1^2 + 2(1*7n)+7n^2, which simplifies to 1+14n+49n^2
