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Mathematics 19 Online
OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

oh sorry I just need to simplify

OpenStudy (anonymous):

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)

OpenStudy (anonymous):

thank you:)

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