Which property tells us to multiply the powers to simplify

There are a couple of operations you can do on powers

We can multiply powers with the same base

x4⋅x2 = (x⋅x⋅x⋅x) ⋅ (x⋅x) = x6

xa⋅xb=xa+b

This is an example of the product of powers property tells us that when you multiply powers with the same base you just have to add the exponents