If [(x-1)/(x+1)] + [(x+1)/(x-1)] is written as mixed number A B/C, then B=______

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You should write `(x-1)/(x+1) + (x+1)/(x-1)`  as a mixed number that consists in a combination of a whole number and a proper fraction, such that:

`(x-1)/(x+1) + (x+1)/(x-1) = ((x-1)(x-1) + (x+1)(x+1))/((x-1)(x+1))`

`(x-1)/(x+1) + (x+1)/(x-1)=...

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thi-dallas | Student

For fraction:

a/b + b/a = 2 + [(b-a)^2]/ab 

b=x+1

a=x-1

Then b-a = x+1 -x+1=2 and 2^2 = 4

the answer = 2 + 4/[(x+1)(x-1)] = A B/C

=> B =4

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