Hi! I'm new to the forum, I'm learning maths from some textbooks over the aussie summer holidays and have no teacher or tutor, so I'm in here bothering you guys
I have to simplify some expressions without using 0 or a negative exponent, and got to this one:
When I worked through it I got 4a^2/9b^4 as the answer, but the textbook says the answer is 9a^2/4b^4. My working went as follows.
I've worked through it a few times and can't figure it out. Can someone tell me where I went wrong? I want to sort it out before I go further.
p.s. I'd use the [tex] codes but they're not showing negative exponents properly when I preview. sorry