Question

1 over (b - 1) + 3 over (1 - b)
can someone explain how to do this problem please? :)

Answer 1

Multiply the second fraction by -1/(-1)
Then you will have 2 fractions with the same denominator and you can add numerators
(1-3)/(b-1)=-2/(b-1) or 2/(1-b)

Answer 2

1/(b-1) + 3/(1-b)
=1/(b-1) - 3/(b-1) = -2/(b-1)

Answer 3

=2/(1-b)

Answer 4

thanks!

Answer 5

you are welcome