Question

\(F=\dfrac{-5}{9}.\dfrac{3}{11}+\dfrac{-13}{18}.\dfrac{3}{11}\)

Answer 1

\(F=\dfrac{-5}{9}\cdot\dfrac{3}{11}+\dfrac{-13}{18}\cdot\dfrac{3}{11}\)

\(=\dfrac{3}{11}\left(-\dfrac{5}{9}-\dfrac{13}{18}\right)\)

\(=\dfrac{3}{11}\cdot\dfrac{-23}{18}\)

\(=-\dfrac{23}{66}\)

Answer 2

F=3/11 .(-5/9 -13/18)= 3/11.(-23/18)= -23/66