Power Rule Question: Why Did 1-2x Become 2x-1?

[fitz_calc]

I just did a problem that made use of the power rule. Here is the final step:

(1-2x)
-------------
-(x-x^2)^5/4

=

(2x-1)
-------------
-(x-x^2)^5/4


Why did 1-2x become 2x-1 (2x-1 is the answer according to my book)??

 

[Doc Al]

Are you sure there's a minus sign in both denominators?

 

[fitz_calc]

yep I'm looking at the solution manual right now...

 

[Doc Al]

Well, that can't be right. (I suspect a typo.)