Catherine simplifies 6^ax6^a/6^b to 6^(a-3+b)

Question

Catherine simplifies 6^ax6^a/6^b to 6^(a-3+b)

Justin simplifies the same expression but gets a different answer, 6^(a+3)-b

Who is correct?

Justin is correct.

Both of them have equivalent expressions.

Catherine is correct.

Neither Catherine or Justin are correct.

Answer 1

Catherine simplifies 6^ax6^a/6^b to 6^(a-3+b)

Neither Catherine nor Justin are correct.