Thread: Simplest form from these offerings

1. Simplest form from these offerings

I cannot decide what I would call 'simplest form'

But I would prefer $6 - 9x^{-1}$ or $3(2 - 3x^{-1})$
But I would prefer $6 - 9x^{-1}$ or $3(2 - 3x^{-1})$