Multiplying Rational Expressions

Question

I'm stuck on this equation. These are the steps I've done so far:

And after this I'm stuck. 1 - 8? It makes no sense. I have no clue about what I did wrong.

Any help is greatly appreciated.

Answer 1

the mistake is in the first line: $$\frac{2(3a^2+24a)}{2(a-8)}=\frac{3a^2+24a}{a-8}$$