Final answer:
The product is: (4n^2 - 4n) / -4
Step-by-step explanation:
To find the product of the given expression, we need to multiply the numerators and the denominators separately.
The numerator of the product is
4n * (n-1)
= 4n^2 - 4n.
The denominator of the product is
4n - 4 * (n+1)
= 4n - 4n - 4
= -4.
Therefore, the product is:
= (4n^2 - 4n) / -4