Answer:
That equation is using associative property : )
Step-by-step explanation:
In mathematics, an equation is a statement that asserts the equality of two expressions, which are connected by the equals sign "=". The word equation and its cognates in other languages may have subtly different meanings; for example, in French an équation is defined as containing one or more variables, while in English, any equality is an equation.
(x^3 - y^3)(x^3 + y^3)
You can get this by factoring based on the a^2 - b^2 model
I believe that the answer is 72.