Question

giúp em với lèm ko tắt ạ:"<

Answer 1

Answer 2

\(-\dfrac{10}{21}=\dfrac{5}{3}\cdot\dfrac{-2}{7}\)

\(\dfrac{2}{21}=\dfrac{2}{3}\cdot\dfrac{1}{7}\)

\(\dfrac{8}{15}=\dfrac{2}{3}\cdot\dfrac{4}{5}\)

Answer 3

a) \(-\dfrac{10}{21}=\dfrac{2}{3}.\dfrac{-5}{7}\)

b) \(\dfrac{2}{21}=\dfrac{2}{3}.\dfrac{1}{7}\)

c) \(\dfrac{8}{15}=\dfrac{2}{3}.\dfrac{4}{5}\)