Question

\(\dfrac{-5}{13}.\dfrac{3}{7}-\dfrac{2}{7}.\dfrac{8}{13}+\dfrac{5}{13}.\dfrac{1}{7}\)

Answer 1

-5/13 . 3/7 - 2/7 . 8/13 + 5/13 . 1/7

= 5/13 . ( -3/7 + 1/7 ) - 2/7 . 8/13

= 5/13 . -2/7 - 2/7 . 8/13

= 2/7 . ( -5/13 - 8/13 )

= 2/7 . -1

= -2/7