help me

For these types of questions I like to asign numbers to each variables and test it out. this is what I did.

a=2 b=3

so I test the first equasion 

$\frac{2*2*3}{3-2}=\frac{12}{1}=12$

and now the second 

$-\frac{2*2*3}{2-3}=-\frac{12}{-1}=12$

both anwsers match so it is equal

Yes , they are equal:

2ab /(b-a)    x  -1/-1    =  -2ab/-(b-a)  =   -2ab/ (a-b)