Answer:
She made a mistake in step 3
She simplified the 3^-8 incorrectly
she should've added them
the answer is 3^24 if you need that
Step-by-step explanation:
using the following rule
[tex]b/x^{-n}=bx^n[/tex]
we can see that she made a made a mistake in step 3 when simplifying
she should've added 3^8 to 3^16 rather than subtracting them
