Step-by-step explanation:
I can only think of one way to simplify this and it is by taking out the greatest common factor: a². Or by multiplying the two values together so it's only one value.
a²(3*5)
a²(15)
Or...
(3a² * 5a²)
(15a⁴)
(this one is a⁴ because a variable with a power multiplied by a variable with a power only adds the powers together)
