Question

(w-3)/(w-9) - (w+1)/(w+9) + (w-117)/(w^2-81)

Answer 1

Do you need to solve for 'w' or just simplify?

Answer 2

oh sorry I just need to simplify

Answer 3

Okay.
You need to find the LCM, just as with normal fractions.
The LCM in this case is (w+9)(w-9).
So multiply each of the three terms by this LCM; expand the polynomials; group and sum the like terms in the numerator.
You should get this:
(15w-135)/((w+9)(w-9))
Factor out the '15' in the numerator.
Further simplification gives the following as your final answer:
15/(w+9)

Answer 4

thank you:)