6p squared - 12pq , the difference between 2 squares doesn't work and i don't really know what do to.

What does it mean by solve the exponential equation for x?

After the seventh month of a 12-month loan: the numerator is: {(n + 11) + (n + 10) + (n + 9) + (n + 8) + (n + 7) + (n + 6) + (n + 5)} = , and the denominator is: {(n) + (n + 1) + + (n + 11)} = . therefore, the fraction is numerator/denominator (to the nearest tenth) = %

How do i do this activity, is appreciated