Answer:

Explanation:
The expression given in the exercise is:

If you descompose the number 8 into its prime factors, you get that:

Therefore, you can rewrite the numerator of the expression as following:

For this exercise you need to remember that for a Difference of cubes:

Then, applying this, you get:

Now, it is necessary to remember the following:

Knowing the above, you can say that:

Therefore applying this, you get that the simplified expression is:
