Final answer:
The mathematical property shown in the equation is the Associative Property of Multiplication.
Step-by-step explanation:
The mathematical property shown in the equation 2 x (3 x 5) = (2 x 3) x 5 is the Associative Property of Multiplication. This property states that you can change the grouping of the numbers being multiplied without changing the final answer. In the equation given, both sides of the equation have the same result because the grouping of the factors is changed.