9/v+w+9/w-v-18v/v^2-w^2

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1 Answer

9/(v+w)+9/(w-v)-18v/(v2-w2)=

[9(w-v)+9(v+w)-18v]/(v2-w2)=

(9w-9v+9v+9w-18v)/(v2-w2)=

(18w-18v)/(v2-w2)=

18(w-v)/(v2-w2)=

18(w-v)/[(v-w)(v+w)]=-18/(v+w).

 

by Top Rated User (1.2m points)

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