Asked by jess

The expression a/a-b + b/b-a is equivalent to
a) 1
b)-1
c) ab/a-b
d)a+b/a^2-b^2

please help!
Answered by Damon
I bet you mean

a/(a-b) + b/(b-a)

a/(a-b) - b/(a-b)

(a-b)/(a-b)

1